<pre id="yuguc"></pre> 溫度華氏轉變攝氏 #include <stdio.h> #include <stdlib.h> enum x {A,B,C,D,E} int main(void) { int a=73,b=85,c=66 { if (a>=90) printf("a=A等級!!\n") else if (a>=80) printf("73分=B等級!!\n") else if (a>=70) printf("73分=C等級!!\n") else if (a>=60) printf("73分=D等級!!\n") else if (a<60) printf("73分=E等級!!\n") } { if (b>=90) printf("b=A等級!!\n") else if (b>=80) printf("85分=B等級!!\n") else if (b>=70) printf("85分=C等級!!\n") else if (b>=60) printf("85分=D等級!!\n") else if (b<60) printf("85分=E等級!!\n") } { if (c>=90) printf("c=A等級!!\n") else if (c>=80) printf("66分=B等級!!\n") else if (c>=70) printf("66分=C等級!!\n") else if (c>=60) printf("66分=D等級!!\n") else if (c<60) printf("66分=E等級!!\n") } system("pause") return 0 }
上傳時間： 2013-12-12
上傳用戶：亞亞娟娟123
Problem B:Longest Ordered Subsequence A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence (a1, a2, ..., aN) be any sequence (ai1, ai2, ..., aiK), where 1 <= i1 < i2 < ... < iK <= N. For example, sequence (1, 7, 3, 5, 9, 4, 8) has ordered subsequences, e. g., (1, 7), (3, 4, 8) and many others. All longest ordered subsequences are of length 4, e. g., (1, 3, 5, 8).
標簽： Subsequence sequence Problem Longest
上傳時間： 2016-12-08
上傳用戶：busterman
Bing is a point-to-point bandwidth measurement tool (hence the b ), based on ping. Bing determines the real (raw, as opposed to available or average) throughput on a link by measuring ICMP echo requests roundtrip times for different packet sizes for each end of the link
標簽： Bing point-to-point measurement determines
上傳時間： 2015-09-15
上傳用戶：lgnf
* "Copyright (c) 2006 Robert B. Reese ("AUTHOR")" * All rights reserved. * (R. Reese, reese@ece.msstate.edu, Mississippi State University) * IN NO EVENT SHALL THE "AUTHOR" BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE "AUTHOR" * HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
上傳時間： 2015-09-24
上傳用戶：mpquest
Visual Basic 6.0可以通過調用API函數格式化一個磁盤，無論是軟盤還是硬盤。 打開一個新的項目(工程1) ，如果你沒有更改過缺省模式，那么Visual Basic 6.0會自動添加一個form1文件，在form1上添加一個命令控件，將下面的代碼拷入。 Option Explicit Private Declare Function SHFormatDrive Lib"shell32"( ByVal Hend AS Long,ByVal Drive AS Long,ByVal FormatID AS Long,ByVal Options AS Long) as Long Private Sub FormatDisk(intDrive as integer,blnQuickFormat as Boolean) dim lngReturn As Long if (blnQuickFormat) then lngReturn= SHFormatDrive(0,intDrive,0&,1&) else lngReturn= SHFormatDrive(0,intDrive,0&,0&) end if end Sub Private Sub Command1_Click() call FormatDisk(0,True) End Sub 運行此程序。 注意FormatDisk函數的第一個變量很重要，他的值是0,1,2時代表格式化的分別是：A、B、C盤。
上傳時間： 2015-10-05
上傳用戶：kytqcool
About: hamsterdb is a database engine written in ANSI C. It supports a B+Tree index structure, uses memory mapped I/O (if available), supports cursors, and can create in-memory databases. Release focus: Major feature enhancements Changes: This release comes with many changes and new features. It can manage multiple databases in one file. A new flag (HAM_LOCK_EXCLUSIVE) places an exclusive lock on the file. hamsterdb was ported to Windows CE, and the Solution file for Visual Studio 2005 now supports builds for x64. Several minor bugs were fixed, performance was improved, and small API changes occurred. Pre-built libraries for Windows (32-bit and 64-bit) are available for download. Author: cruppstahl
標簽： C. hamsterdb structure database
上傳時間： 2013-12-11
上傳用戶：LouieWu
/* ********************************************************************************************************* * uC/TCP-IP V2 * The Embedded TCP/IP Suite * * (c) Copyright 2003-2010; Micrium, Inc.; Weston, FL * * All rights reserved. Protected by international copyright laws. * * uC/TCP-IP is provided in source form to registered licensees ONLY. It is * illegal to distribute this source code to any third party unless you receive * written permission by an authorized Micrium representative. Knowledge of * the source code may NOT be used to develop a similar product. * * Please help us continue to provide the Embedded community with the finest * software available. Your honesty is greatly appreciated. * * You can contact us at www.micrium.com. ********************************************************************************************************* */ /* ********************************************************************************************************* * * NETWORK TCP LAYER * (TRANSMISSION CONTROL PROTOCOL) * * Filename : net_tcp.h * Version : V2.10 * Programmer(s) : ITJ ********************************************************************************************************* * Note(s) : (1) Supports Transmission Control Protocol as described in RFC #793 with the following * restrictions/constraints : * * (a) TCP Security & Precedence NOT supported RFC # 793, Section 3.6 * * (b) TCP Urgent Data NOT supported RFC # 793, Section 3.7 * 'The Communication of * Urgent Information' * * (c) The following TCP options NOT supported : * * (1) Window Scale RFC #1072, Section 2 * RFC #1323, Section 2 * (2) Selective Acknowledgement (SACK) RFC #1072, Section 3 * RFC #2018 * RFC #2883 * (3) TCP Echo RFC #1072, Section 4 * (4) Timestamp RFC #1323, Section 3.2 * (5) Protection Against Wrapped Sequences (PAWS) RFC #1323, Section 4 * * (d) #### IP-Options-to-TCP-Connection RFC #1122, Section 4.2.3.8 * Handling NOT supported * * (e) #### ICMP-Error-Message-to-TCP-Connection RFC #1122, Section 4.2.3.9 * Handling NOT currently supported * * (2) TCP Layer assumes/requires Network Socket Layer (see 'net_sock.h MODULE Note #1a2'). ********************************************************************************************************* */ /*$PAGE*/ /* ********************************************************************************************************* * MODULE * * Note(s) : (1) TCP Layer module is NOT required for UDP-to-Application API configuration. * * See also 'net_cfg.h TRANSPORT LAYER CONFIGURATION' * & 'net_cfg.h USER DATAGRAM PROTOCOL LAYER CONFIGURATION'. * * See also 'net_tcp.h Note #2'. * * (2) The following TCP-module-present configuration value MUST be pre-#define'd in * 'net_cfg_net.h' PRIOR to all other network modules that require TCP Layer * configuration (see 'net_cfg_net.h TCP LAYER CONFIGURATION Note #2b') : * * NET_TCP_MODULE_PRESENT ********************************************************************************************************* */ #ifdef NET_TCP_MODULE_PRESENT /* See Note #2. */ /* ********************************************************************************************************* * EXTERNS ********************************************************************************************************* */ #if ((defined(NET_TCP_MODULE)) && \ (defined(NET_GLOBALS_EXT))) #define NET_TCP_EXT #else #define NET_TCP_EXT extern #endif /*$PAGE*/ /* ********************************************************************************************************* * DEFINES ********************************************************************************************************* */ /* ********************************************************************************************************* * TCP HEADER DEFINES * * Note(s) : (1) The following TCP value MUST be pre-#define'd in 'net_def.h' PRIOR to 'net_buf.h' so that * the Network Buffer Module can configure maximum buffer header size (see 'net_def.h TCP * LAYER DEFINES' & 'net_buf.h NETWORK BUFFER INDEX & SIZE DEFINES Note #1') : * * (a) NET_TCP_HDR_SIZE_MAX 60 (NET_TCP_HDR_LEN_MAX * * NET_TCP_HDR_LEN_WORD_SIZE) * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_LEN_MASK 0xF000u #define NET_TCP_HDR_LEN_SHIFT 12u #define NET_TCP_HDR_LEN_NONE 0u #define NET_TCP_HDR_LEN_MIN 5u #define NET_TCP_HDR_LEN_MAX 15u #define NET_TCP_HDR_LEN_WORD_SIZE CPU_WORD_SIZE_32 #define NET_TCP_HDR_SIZE_MIN (NET_TCP_HDR_LEN_MIN * NET_TCP_HDR_LEN_WORD_SIZE) #if 0 /* See Note #1a. */ #define NET_TCP_HDR_SIZE_MAX (NET_TCP_HDR_LEN_MAX * NET_TCP_HDR_LEN_WORD_SIZE) #endif #define NET_TCP_HDR_SIZE_TOT_MIN (NET_IP_HDR_SIZE_TOT_MIN + NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_SIZE_TOT_MAX (NET_IP_HDR_SIZE_TOT_MAX + NET_TCP_HDR_SIZE_MAX) #define NET_TCP_PSEUDO_HDR_SIZE 12u /* = sizeof(NET_TCP_PSEUDO_HDR) */ #define NET_TCP_PORT_NBR_RESERVED NET_PORT_NBR_RESERVED #define NET_TCP_PORT_NBR_NONE NET_TCP_PORT_NBR_RESERVED #define NET_TCP_HDR_URG_PTR_NONE 0x0000u /* See Note #2. */ /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER FLAG DEFINES * * Note(s) : (1) See 'TCP HEADER Note #2' for flag fields. * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_FLAG_MASK 0x0FFFu #define NET_TCP_HDR_FLAG_NONE DEF_BIT_NONE #define NET_TCP_HDR_FLAG_RESERVED 0x0FE0u /* MUST be '0'. */ #define NET_TCP_HDR_FLAG_URGENT DEF_BIT_05 /* See Note #2. */ #define NET_TCP_HDR_FLAG_ACK DEF_BIT_04 #define NET_TCP_HDR_FLAG_PUSH DEF_BIT_03 #define NET_TCP_HDR_FLAG_RESET DEF_BIT_02 #define NET_TCP_HDR_FLAG_SYNC DEF_BIT_01 #define NET_TCP_HDR_FLAG_FIN DEF_BIT_00 #define NET_TCP_HDR_FLAG_CLOSE NET_TCP_HDR_FLAG_FIN /* ********************************************************************************************************* * TCP FLAG DEFINES ********************************************************************************************************* */ /* ------------------ NET TCP FLAGS ------------------- */ #define NET_TCP_FLAG_NONE DEF_BIT_NONE #define NET_TCP_FLAG_USED DEF_BIT_00 /* TCP conn cur used; i.e. NOT in free TCP conn pool. */ /* ------------------ TCP TX FLAGS ------------------- */ /* TCP tx flags copied from TCP hdr flags. */ #define NET_TCP_FLAG_TX_FIN NET_TCP_HDR_FLAG_FIN #define NET_TCP_FLAG_TX_CLOSE NET_TCP_FLAG_TX_FIN #define NET_TCP_FLAG_TX_SYNC NET_TCP_HDR_FLAG_SYNC #define NET_TCP_FLAG_TX_RESET NET_TCP_HDR_FLAG_RESET #define NET_TCP_FLAG_TX_PUSH NET_TCP_HDR_FLAG_PUSH #define NET_TCP_FLAG_TX_ACK NET_TCP_HDR_FLAG_ACK #define NET_TCP_FLAG_TX_URGENT NET_TCP_HDR_FLAG_URGENT #define NET_TCP_FLAG_TX_BLOCK DEF_BIT_07 /* ------------------ TCP RX FLAGS ------------------- */ #define NET_TCP_FLAG_RX_DATA_PEEK DEF_BIT_08 #define NET_TCP_FLAG_RX_BLOCK DEF_BIT_15 /*$PAGE*/ /* ********************************************************************************************************* * TCP TYPE DEFINES * * Note(s) : (1) NET_TCP_TYPE_&&& #define values specifically chosen as ASCII representations of the TCP * types. Memory displays of TCP types will display with their chosen ASCII names. ********************************************************************************************************* */ /* ------------------ NET TCP TYPES ------------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x20504354u /* "TCP " in ASCII. */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x43542050u /* "TCP " in ASCII. */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #endif #endif /* ********************************************************************************************************* * TCP SEQUENCE NUMBER DEFINES * * Note(s) : (1) TCP initial transmit sequence number is incremented by a fixed value, preferably a large * prime value or a large value with multiple unique factors. * * (a) One reasonable TCP initial transmit sequence number increment value example : * * 65527 = 37 * 23 * 11 * 7 * * * #### NET_TCP_TX_SEQ_NBR_CTR_INC could be developer-configured in 'net_cfg.h'. * * See also 'NET_TCP_TX_GET_SEQ_NBR() Notes #1b2 & #1c2'. ********************************************************************************************************* */ #define NET_TCP_SEQ_NBR_NONE 0u #define NET_TCP_ACK_NBR_NONE NET_TCP_SEQ_NBR_NONE #define NET_TCP_TX_SEQ_NBR_CTR_INC 65527u /* See Note #1. */ #define NET_TCP_ACK_NBR_DUP_WIN_SIZE_SCALE 4 /*$PAGE*/ /* ********************************************************************************************************* * TCP DATA/TOTAL LENGTH DEFINES * * Note(s) : (1) (a) TCP total length #define's (NET_TCP_TOT_LEN) relate to the total size of a complete * TCP packet, including the packet's TCP header. Note that a complete TCP packet MAY * be fragmented in multiple Internet Protocol packets. * * (b) TCP data length #define's (NET_TCP_DATA_LEN) relate to the data size of a complete * TCP packet, equal to the total TCP packet length minus its TCP header size. Note * that a complete TCP packet MAY be fragmented in multiple Internet Protocol packets. ********************************************************************************************************* */ /* See Notes #1a & #1b. */ #define NET_TCP_DATA_LEN_MIN 0u #define NET_TCP_TOT_LEN_MIN (NET_TCP_HDR_SIZE_MIN + NET_TCP_DATA_LEN_MIN) #define NET_TCP_TOT_LEN_MAX (NET_IP_TOT_LEN_MAX - NET_IP_HDR_SIZE_MIN ) #define NET_TCP_DATA_LEN_MAX (NET_TCP_TOT_LEN_MAX - NET_TCP_HDR_SIZE_MIN) /*$PAGE*/ /* ********************************************************************************************************* * TCP SEGMENT SIZE DEFINES * * Note(s) : (1) (a) RFC # 879, Section 3 states that the TCP Maximum Segment Size "counts only * data octets in the segment, ... not the TCP header or the IP header". * * (b) RFC #1122, Section 4.2.2.6 requires that : * * (1) "The MSS value to be sent in an MSS option must be less than or equal to * * (A) MMS_R - 20 * * where MMS_R is the maximum size for a transport-layer message that can * be received." * * (2) "If an MSS option is not received at connection setup, TCP MUST assume a * default send MSS of 536 (576 - 40)." * * See also 'net_ip.h IP DATA/TOTAL LENGTH DEFINES Note #1'. ********************************************************************************************************* */ /* See Note #1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT (NET_IP_MAX_DATAGRAM_SIZE_DFLT - NET_IP_HDR_SIZE_MIN - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_MAX_SEG_SIZE_DFLT_RX NET_TCP_DATA_LEN_MAX /* See Note #1b1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT_TX NET_TCP_MAX_SEG_SIZE_DFLT /* See Note #1b2. */ #define NET_TCP_MAX_SEG_SIZE_NONE 0u #define NET_TCP_MAX_SEG_SIZE_MIN NET_TCP_MAX_SEG_SIZE_DFLT #define NET_TCP_MAX_SEG_SIZE_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_MIN NET_TCP_DATA_LEN_MIN #define NET_TCP_SEG_LEN_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_SYNC 1u #define NET_TCP_SEG_LEN_FIN 1u #define NET_TCP_SEG_LEN_CLOSE NET_TCP_SEG_LEN_FIN #define NET_TCP_SEG_LEN_ACK 0u #define NET_TCP_SEG_LEN_RESET 0u #define NET_TCP_SEG_LEN_PROBE 0u #define NET_TCP_DATA_LEN_TX_SYNC 0u #define NET_TCP_DATA_LEN_TX_FIN 0u #define NET_TCP_DATA_LEN_TX_CLOSE NET_TCP_DATA_LEN_TX_FIN #define NET_TCP_DATA_LEN_TX_ACK 0u #define NET_TCP_DATA_LEN_TX_PROBE_NO_DATA 0u #define NET_TCP_DATA_LEN_TX_PROBE_DATA 1u #define NET_TCP_DATA_LEN_TX_RESET 0u #define NET_TCP_TX_PROBE_DATA 0x00u /* ********************************************************************************************************* * TCP WINDOW SIZE DEFINES * * Note(s) : (1) Although NO RFC specifies the absolute minimum TCP connection window size value allowed, * RFC #793, Section 3.7 'Data Communication : Managing the Window' states that for "the * window ... there is an assumption that this is related to the currently available data * buffer space available for this connection". ********************************************************************************************************* */ #define NET_TCP_WIN_SIZE_NONE 0u #define NET_TCP_WIN_SIZE_MIN NET_TCP_MAX_SEG_SIZE_MIN #define NET_TCP_WIN_SIZE_MAX DEF_INT_16U_MAX_VAL /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER OPTIONS DEFINES * * Note(s) : (1) See the following RFC's for TCP options summary : * * (a) RFC # 793, Section 3.1 'Header Format : Options' * (b) RFC #1122; Sections 4.2.2.5, 4.2.2.6 * * (2) TCP option types are encoded in the first octet for each TCP option as follows : * * -------- * | TYPE | * -------- * * The TCP option type value determines the TCP option format : * * (a) The following TCP option types are single-octet TCP options -- i.e. the option type * octet is the ONLY octet for the TCP option. * * (1) TYPE = 0 End of Options List * (2) TYPE = 1 No Operation * * * (b) All other TCP options MUST be multi-octet TCP options (see RFC #1122, Section 4.2.2.5) : * * ------------------------------ * | TYPE | LEN | TCP OPT | * ------------------------------ * * where * TYPE Indicates the specific TCP option type * LEN Indicates the total TCP option length, in octets, including * the option type & the option length octets * TCP OPT Additional TCP option octets, if any, that contain the remaining * TCP option information * * The following TCP option types are multi-octet TCP options where the option's second * octet specify the total TCP option length, in octets, including the option type & the * option length octets : * * (1) TYPE = 2 Maximum Segment Size See RFC # 793, Section 3.1 'Header Format : * Options : Maximum Segment Size'; * RFC #1122, Section 4.2.2.6; * RFC # 879, Section 3 * * (2) TYPE = 3 Window Scale See 'net_tcp.h Note #1c1' * (3) TYPE = 4 SACK Allowed See 'net_tcp.h Note #1c2' * (4) TYPE = 5 SACK Option See 'net_tcp.h Note #1c2' * (5) TYPE = 6 Echo Request See 'net_tcp.h Note #1c3' * (6) TYPE = 7 Echo Reply See 'net_tcp.h Note #1c3' * (7) TYPE = 8 Timestamp See 'net_tcp.h Note #1c4' * * (3) TCP header allows for a maximum option list length of 40 octets : * * NET_TCP_HDR_OPT_SIZE_MAX = NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN * * = 60 - 20 * * = 40 * * (4) 'NET_TCP_OPT_SIZE' MUST be pre-defined PRIOR to all definitions that require TCP option * size data type. ********************************************************************************************************* */ /*$PAGE*/ #define NET_TCP_HDR_OPT_END_LIST 0u #define NET_TCP_HDR_OPT_NOP 1u #define NET_TCP_HDR_OPT_MAX_SEG_SIZE 2u #define NET_TCP_HDR_OPT_WIN_SCALE 3u #define NET_TCP_HDR_OPT_SACK_PERMIT 4u #define NET_TCP_HDR_OPT_SACK 5u #define NET_TCP_HDR_OPT_ECHO_REQ 6u #define NET_TCP_HDR_OPT_ECHO_REPLY 7u #define NET_TCP_HDR_OPT_TS 8u #define NET_TCP_HDR_OPT_PAD NET_TCP_HDR_OPT_END_LIST #define NET_TCP_HDR_OPT_LEN_END_LIST 1u #define NET_TCP_HDR_OPT_LEN_NOP 1u #define NET_TCP_HDR_OPT_LEN_MAX_SEG_SIZE 4u #define NET_TCP_HDR_OPT_LEN_WIN_SCALE 3u #define NET_TCP_HDR_OPT_LEN_SACK_PERMIT 2u #define NET_TCP_HDR_OPT_LEN_ECHO_REQ 6u #define NET_TCP_HDR_OPT_LEN_ECHO_REPLY 6u #define NET_TCP_HDR_OPT_LEN_TS 10u #define NET_TCP_HDR_OPT_LEN_SACK_MIN 6u #define NET_TCP_HDR_OPT_LEN_SACK_MAX 38u #define NET_TCP_HDR_OPT_LEN_MIN 1u #define NET_TCP_HDR_OPT_LEN_MIN_LEN 2u #define NET_TCP_HDR_OPT_LEN_MAX 38u typedef CPU_INT32U NET_TCP_OPT_SIZE; /* TCP opt size data type (see Note #4). */ #define NET_TCP_HDR_OPT_SIZE_WORD (sizeof(NET_TCP_OPT_SIZE)) #define NET_TCP_HDR_OPT_SIZE_MAX (NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_OPT_NBR_MIN 0u #define NET_TCP_HDR_OPT_NBR_MAX (NET_TCP_HDR_OPT_SIZE_MAX / NET_TCP_HDR_OPT_SIZE_WORD) #define NET_TCP_HDR_OPT_IX NET_TCP_HDR_SIZE_MIN /*$PAGE*/ /* ********************************************************************************************************* * TCP OPTION CONFIGURATION TYPE DEFINES * * Note(s) : (1) NET_TCP_OPT_CFG_TYPE_&&& #define values specifically chosen as ASCII representations of * the TCP option configuration types. Memory displays of TCP option configuration buffers * will display the TCP option configuration TYPEs with their chosen ASCII names. ********************************************************************************************************* */ /* ---------------- TCP OPT CFG TYPES ----------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_OPT_CFG_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x2053534Du /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x204E4957u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x504B4353u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x4B434153u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x51455245u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4F484345u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x20205354u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x534D2053u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x4957204Eu /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x4353504Bu /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x41534B43u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x52455145u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x43454F48u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x53542020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #endif #endif /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION TIMEOUT DEFINES * * Note(s) : (1) (a) (1) RFC #1122, Section 4.2.2.13 'DISCUSSION' states that "the graceful close algorithm * of TCP requires that the connection state remain defined on (at least) one end of * the connection, for a timeout period of 2xMSL ... During this period, the (remote * socket, local socket) pair that defines the connection is busy and cannot be reused". * * (2) The following sections reiterate that the TIME-WAIT state timeout scalar is two * maximum segment lifetimes (2 MSL) : * * (A) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check Sequence Number : TIME-WAIT STATE' * (B) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check FIN Bit : TIME-WAIT STATE' * * (b) (1) RFC #793, Section 3.3 'Sequence Numbers : Knowing When to Keep Quiet' states that * "the Maximum Segment Lifetime (MSL) is ... to be 2 minutes. This is an engineering * choice, and may be changed if experience indicates it is desirable to do so". * * (2) Microsoft Corporation's Windows XP defaults MSL to 15 seconds. ********************************************************************************************************* */ /* Max seg timeout (see Note #1b) : */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MIN_SEC ( 0u ) /* ... min = 0 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MAX_SEC ( 2u * DEF_TIME_NBR_SEC_PER_MIN) /* ... max = 2 minutes */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_DFLT_SEC ( 15u ) /* ... dflt = 15 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_SCALAR 2u /* ... scalar (see Note #1a). */ #define NET_TCP_CONN_TIMEOUT_CONN_DFLT_SEC (120u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt conn timeout = 120 minutes */ #define NET_TCP_CONN_TIMEOUT_USER_DFLT_SEC ( 30u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt user timeout = 30 minutes */ /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION STATES * * Note(s) : (1) See the following RFC's for TCP state machine summary : * * (a) RFC # 793; Sections 3.2, 3.4, 3.5, 3.9 * (b) RFC #1122; Sections 4.2.2.8, 4.2.2.10, 4.2.2.11, 4.2.2.13, 4.2.2.18, 4.2.2.20 * * (2) (a) #### Additional closing-data-available state used for closing connections to allow the * application layer to receive any remaining data. * * See also 'net_tcp.c NetTCP_RxPktConnHandlerFinWait1() Note #2f5A2', * 'net_tcp.c NetTCP_RxPktConnHandlerFinWait2() Note #2f5B', * 'net_tcp.c NetTCP_RxPktConnHandlerClosing() Note #2d2B2a1B', * & 'net_tcp.c NetTCP_RxPktConnHandlerLastAck() Note #2d2A1b'. ********************************************************************************************************* */ #define NET_TCP_CONN_STATE_NONE 0u #define NET_TCP_CONN_STATE_FREE 1u #define NET_TCP_CONN_STATE_CLOSED 10u #define NET_TCP_CONN_STATE_LISTEN 20u #define NET_TCP_CONN_STATE_SYNC_RXD 30u #define NET_TCP_CONN_STATE_SYNC_RXD_PASSIVE 31u #define NET_TCP_CONN_STATE_SYNC_RXD_ACTIVE 32u #define NET_TCP_CONN_STATE_SYNC_TXD 35u #define NET_TCP_CONN_STATE_CONN 40u #define NET_TCP_CONN_STATE_FIN_WAIT_1 50u #define NET_TCP_CONN_STATE_FIN_WAIT_2 51u #define NET_TCP_CONN_STATE_CLOSING 52u #define NET_TCP_CONN_STATE_TIME_WAIT 53u #define NET_TCP_CONN_STATE_CLOSE_WAIT 55u #define NET_TCP_CONN_STATE_LAST_ACK 56u #define NET_TCP_CONN_STATE_CLOSING_DATA_AVAIL 59u /* See Note #2a. */ /* ********************************************************************************************************* * TCP CONNECTION QUEUE STATES ********************************************************************************************************* */ #define NET_TCP_RX_Q_STATE_NONE 0u #define NET_TCP_RX_Q_STATE_CLOSED 100u #define NET_TCP_RX_Q_STATE_CLOSING 101u #define NET_TCP_RX_Q_STATE_SYNC 110u #define NET_TCP_RX_Q_STATE_CONN 111u #define NET_TCP_TX_Q_STATE_NONE 0u #define NET_TCP_TX_Q_STATE_CLOSED 200u #define NET_TCP_TX_Q_STATE_CLOSING 201u #define NET_TCP_TX_Q_STATE_SYNC 210u #define NET_TCP_TX_Q_STATE_CONN 211u #define NET_TCP_TX_Q_STATE_SUSPEND 215u #define NET_TCP_TX_Q_STATE_CLOSED_SUSPEND 220u #define NET_TCP_TX_Q_STATE_CLOSING_SUSPEND 221u /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION CODE DEFINES **************
上傳時間： 2015-11-22
上傳用戶：the same kong
批處理感知器算法的代碼matlab w1=[1,0.1,1.1;1,6.8,7.1;1,-3.5,-4.1;1,2.0,2.7;1,4.1,2.8;1,3.1,5.0;1,-0.8,-1.3; 1,0.9,1.2;1,5.0,6.4;1,3.9,4.0]; w2=[1,7.1,4.2;1,-1.4,-4.3;1,4.5,0.0;1,6.3,1.6;1,4.2,1.9;1,1.4,-3.2;1,2.4,-4.0; 1,2.5,-6.1;1,8.4,3.7;1,4.1,-2.2]; w3=[1,-3.0,-2.9;1,0.5,8.7;1,2.9,2.1;1,-0.1,5.2;1,-4.0,2.2;1,-1.3,3.7;1,-3.4,6.2; 1,-4.1,3.4;1,-5.1,1.6;1,1.9,5.1]; figure; plot(w3(:,2),w3(:,3),'ro'); hold on; plot(w2(:,2),w2(:,3),'b+'); W=[w2;-w3];%增廣樣本規范化 a=[0,0,0]; k=0;%記錄步數 n=1; y=zeros(size(W,2),1);%記錄錯分的樣本 while any(y<=0) k=k+1; y=a*transpose(W);%記錄錯分的樣本 a=a+sum(W(find(y<=0),:));%更新a if k >= 250 break end end if k<250 disp(['a為：',num2str(a)]) disp(['k為：',num2str(k)]) else disp(['在250步以內沒有收斂，終止']) end %判決面：x2=-a2*x1/a3-a1/a3 xmin=min(min(w1(:,2)),min(w2(:,2))); xmax=max(max(w1(:,2)),max(w2(:,2))); x=xmin-1:xmax+1;%(xmax-xmin): y=-a(2)*x/a(3)-a(1)/a(3); plot(x,y)
上傳時間： 2016-11-07
上傳用戶：a1241314660
#include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//輸出菜單 void choosemenu(void);//菜單選擇 void input_student1(int);//輸入學生信息 void input_student2(void);//輸入總函數 void input_student3(int &,int);//判斷學號是否重復 void input_student4(int,int);//覆蓋原信息 void sort_student3(student s[],int);//按照英語成績排序 void sort_student4(student s[],int);//按照計算機成績排序 void sort_student2(student s[],int);//按照數學成績排序 void sort_student5(student s[],int);//按照平均成績排序 float input_score2(int);//計算學生平均成績 void print_student2(void);//顯示表頭 void print_student3(int);//顯示學生信息 void print_student1(int);//顯示全部學生資料 void sort_student1(void);//排序總函數 void menu(void);//菜單調度總函數 int search_student2(int);//按學號查詢學生信息并輸出 void search_student3(int);//按平均分最高查詢并輸出 void search_student1(void);//查詢總函數 void delete_student2(int,int);//刪除學生信息 void delete_student1(void);//刪除總函數 void change_student2(int);//修改學生資料 void change_student1(void);//修改總函數 void input_score3(int);//統計成績 void input_score1(void);//統計成績總函數 void print_help(void);//輸出幫助信息 void exit_student(void);//退出系統 void save_student(student *,int);//保存學生信息 void main() { menu(); } void save_student(student *s,int a)//保存學生信息 { FILE *fp; if((fp=fopen("d:\\學生信息.txt","wb"))==NULL) { printf("不能打開文件！\n"); } else { printf("保存信息到D盤\n"); fprintf(fp,"本班所有學生具體信息如下：\r\n"); fprintf(fp," 學號 姓名 數學成績 英語成績 計算機成績 平均成績\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系統 { exit(1); } void print_help(void)//輸出幫助信息 { printf("本系統所能容納的最大學生數為%d人\n學生信息保存在D盤根目錄下，保存文件為“學生信息.txt”。\n感謝使用！\n",N); } void input_score1(void)//統計成績總函數 { int c; c=search_student2(iNumOfStu); printf("學號：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成績錄入成功！\n"); stu[c].average=input_score2(c); } void input_score3(int a)//統計成績 { printf("數學新成績："); scanf("%f",&stu[a].sco.math); printf("英語新成績："); scanf("%f",&stu[a].sco.english); printf("計算機新成績："); scanf("%f",&stu[a].sco.computer); } void change_student2(int a)//修改學生資料 { printf("學號：%d----修改為：",stu[a].number); scanf("%d",&stu[a].number); getchar(); printf("姓名：%s----修改為：",stu[a].name); gets(stu[a].name); printf("數學成績：%.2f----修改為：",stu[a].sco.math); scanf("%f",&stu[a].sco.math); printf("英語成績：%.2f----修改為：",stu[a].sco.english); scanf("%f",&stu[a].sco.english); printf("計算機成績：%.2f----修改為：",stu[a].sco.computer); scanf("%f",&stu[a].sco.computer); } void change_student1(void)//修改總函數 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否要修改此學生信息？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { change_student2(c); stu[c].average=input_score2(c); printf("信息修改成功！\n"); } } void delete_student1(void)//刪除總函數 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否刪除此條記錄？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { delete_student2(c,iNumOfStu); printf("記錄已刪除！\n"); } } void delete_student2(int a,int b)//刪除學生信息 { for(int i=a;i<b-1;i++) { stu[i]=stu[i+1]; } --iNumOfStu; } void search_student1(void)//查詢總函數 { printf("1、按學號查詢\n2、按平均分最高查詢\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { search_student2(iNumOfStu); break; } case 2: { search_student3(iNumOfStu); break; } default: break; } } void menu(void)//菜單調度總函數 { print_menu(); choosemenu(); } void sort_student1(void)//排序總函數 { printf("1、按數學成績排序\n2、按英語成績排序\n3、按計算機成績排序\n4、按平均成績排序\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { sort_student2(stu,iNumOfStu); break; } case 2: { sort_student3(stu,iNumOfStu); break; } case 3: { sort_student4(stu,iNumOfStu); break; } case 4: { sort_student5(stu,iNumOfStu); break; } default: break; } } void print_student1(int a)//顯示全部學生資料 { printf("本班所有學生具體信息如下\n"); print_student2(); for(int i=0;i<a;i++) { print_student3(i); } } void print_student3(int a)//顯示學生信息 { printf("%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[a].number,stu[a].name,stu[a].sco.math,stu[a].sco.english,stu[a].sco.computer,stu[a].average); } void print_student2(void)//顯示表頭 { printf(" 學號 姓名 數學成績 英語成績 計算機成績 平均成績\n"); } void input_student4(int a,int b)//覆蓋原信息 { stu[a]=stu[b-1]; --iNumOfStu; } void input_student3(int &a,int b)//判斷學號是否重復 { if(a!=0) { int i=0; do { if(stu[a].number==stu[i].number) { printf("此學號代表的學生已錄入\n1、覆蓋原信息\n2、重新輸入\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { input_student4(i,iNumOfStu); a=iNumOfStu-1; printf("信息已替換！\n"); break; } case 2: { printf("請重新輸入學生信息：\n"); input_student1(iNumOfStu-1); break; } default: break; } break; } ++i; } while(i<b-1); } } void print_menu(void)//輸出菜單 { printf("======歡迎來到學生信息管理系統======\n"); printf(" 1、輸入學生資料\n"); printf(" 2、刪除學生資料\n"); printf(" 3、查詢學生資料\n"); printf(" 4、修改學生資料\n"); printf(" 5、顯示學生資料\n"); printf(" 6、統計學生成績\n"); printf(" 7、排序學生成績\n"); printf(" 8、保存學生資料\n"); printf(" 9、獲取幫助信息\n"); printf(" 10、退出系統\n"); printf("====================================\n"); printf("請選擇："); } void input_student2(void)//輸入總函數 { char end; printf("請輸入學生信息（在最后一個學生信息錄入完成后以“/”結束錄入）：\n"); for(int i=0;(end=getchar())!='/';i++) { input_student1(i); ++iNumOfStu; input_student3(i,iNumOfStu); } for(int j=0;j<iNumOfStu;j++) { stu[j].average=input_score2(j); } } void input_student1(int a)//輸入學生信息 { printf("學號："); scanf("%d",&stu[a].number); getchar(); printf("姓名："); gets(stu[a].name); printf("數學成績："); scanf("%f",&stu[a].sco.math); printf("英語成績："); scanf("%f",&stu[a].sco.english); printf("計算機成績："); scanf("%f",&stu[a].sco.computer); } float input_score2(int a)//計算學生平均成績 { return (stu[a].sco.math+stu[a].sco.english+stu[a].sco.computer)/3; } void search_student3(int a)//按平均分最高查詢并輸出 { int max=0; for(int i=0;i<a;i++) { if(stu[max].average<stu[i].average) { max=i; } } print_student2(); print_student3(max); } void sort_student2(student s[],int a)//按照數學成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.math>stu[max].sco.math) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student3(student s[],int a)//按照英語成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.english>stu[max].sco.english) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student4(student s[],int a)//按照計算機成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.computer>stu[max].sco.computer) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student5(student s[],int a)//按照平均成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].average>stu[max].average) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } int search_student2(int a)//按照學號查找學生并輸出 { int num; int c; printf("請輸入要查詢的學號："); scanf("%d",&num); for(int i=0;i<a;i++) { if(num==stu[i].number) { c=i; } } printf("此學生的信息是：\n"); print_student2(); print_student3(c); return c; } void choosemenu(void)//菜單選擇 { int i; scanf("%d",&i); switch(i) { case 1: { input_student2(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 2: { delete_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 3: { search_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 4: { change_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 5: { print_student1(iNumOfStu); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 6: { input_score1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 7: { sort_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 8: { save_student(stu,iNumOfStu); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 9: { print_help(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 10: { exit_student(); } default: break; } } 運行結果： 源文件下載地址： http://115.com/file/clnq138g#一個簡單的學生成績管理系統.rar （請將此地址復制到瀏覽器地址欄中訪問下載頁面）
標簽： 成績查詢系統
上傳時間： 2019-06-08
上傳用戶：啊的撒旦
#include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//輸出菜單 void choosemenu(void);//菜單選擇 void input_student1(int);//輸入學生信息 void input_student2(void);//輸入總函數 void input_student3(int &,int);//判斷學號是否重復 void input_student4(int,int);//覆蓋原信息 void sort_student3(student s[],int);//按照英語成績排序 void sort_student4(student s[],int);//按照計算機成績排序 void sort_student2(student s[],int);//按照數學成績排序 void sort_student5(student s[],int);//按照平均成績排序 float input_score2(int);//計算學生平均成績 void print_student2(void);//顯示表頭 void print_student3(int);//顯示學生信息 void print_student1(int);//顯示全部學生資料 void sort_student1(void);//排序總函數 void menu(void);//菜單調度總函數 int search_student2(int);//按學號查詢學生信息并輸出 void search_student3(int);//按平均分最高查詢并輸出 void search_student1(void);//查詢總函數 void delete_student2(int,int);//刪除學生信息 void delete_student1(void);//刪除總函數 void change_student2(int);//修改學生資料 void change_student1(void);//修改總函數 void input_score3(int);//統計成績 void input_score1(void);//統計成績總函數 void print_help(void);//輸出幫助信息 void exit_student(void);//退出系統 void save_student(student *,int);//保存學生信息 void main() { menu(); } void save_student(student *s,int a)//保存學生信息 { FILE *fp; if((fp=fopen("d:\\學生信息.txt","wb"))==NULL) { printf("不能打開文件！\n"); } else { printf("保存信息到D盤\n"); fprintf(fp,"本班所有學生具體信息如下：\r\n"); fprintf(fp," 學號 姓名 數學成績 英語成績 計算機成績 平均成績\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系統 { exit(1); } void print_help(void)//輸出幫助信息 { printf("本系統所能容納的最大學生數為%d人\n學生信息保存在D盤根目錄下，保存文件為“學生信息.txt”。\n感謝使用！\n",N); } void input_score1(void)//統計成績總函數 { int c; c=search_student2(iNumOfStu); printf("學號：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成績錄入成功！\n"); stu[c].average=input_score2(c); } void input_score3(int a)//統計成績 { printf("數學新成績："); scanf("%f",&stu[a].sco.math); printf("英語新成績："); scanf("%f",&stu[a].sco.english); printf("計算機新成績："); scanf("%f",&stu[a].sco.computer); } void change_student2(int a)//修改學生資料 { printf("學號：%d----修改為：",stu[a].number); scanf("%d",&stu[a].number); getchar(); printf("姓名：%s----修改為：",stu[a].name); gets(stu[a].name); printf("數學成績：%.2f----修改為：",stu[a].sco.math); scanf("%f",&stu[a].sco.math); printf("英語成績：%.2f----修改為：",stu[a].sco.english); scanf("%f",&stu[a].sco.english); printf("計算機成績：%.2f----修改為：",stu[a].sco.computer); scanf("%f",&stu[a].sco.computer); } void change_student1(void)//修改總函數 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否要修改此學生信息？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { change_student2(c); stu[c].average=input_score2(c); printf("信息修改成功！\n"); } } void delete_student1(void)//刪除總函數 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否刪除此條記錄？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { delete_student2(c,iNumOfStu); printf("記錄已刪除！\n"); } } void delete_student2(int a,int b)//刪除學生信息 { for(int i=a;i<b-1;i++) { stu[i]=stu[i+1]; } --iNumOfStu; } void search_student1(void)//查詢總函數 { printf("1、按學號查詢\n2、按平均分最高查詢\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { search_student2(iNumOfStu); break; } case 2: { search_student3(iNumOfStu); break; } default: break; } } void menu(void)//菜單調度總函數 { print_menu(); choosemenu(); } void sort_student1(void)//排序總函數 { printf("1、按數學成績排序\n2、按英語成績排序\n3、按計算機成績排序\n4、按平均成績排序\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { sort_student2(stu,iNumOfStu); break; } case 2: { sort_student3(stu,iNumOfStu); break; } case 3: { sort_student4(stu,iNumOfStu); break; } case 4: { sort_student5(stu,iNumOfStu); break; } default: break; } } void print_student1(int a)//顯示全部學生資料 { printf("本班所有學生具體信息如下\n"); print_student2(); for(int i=0;i<a;i++) { print_student3(i); } } void print_student3(int a)//顯示學生信息 { printf("%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[a].number,stu[a].name,stu[a].sco.math,stu[a].sco.english,stu[a].sco.computer,stu[a].average); } void print_student2(void)//顯示表頭 { printf(" 學號 姓名 數學成績 英語成績 計算機成績 平均成績\n"); } void input_student4(int a,int b)//覆蓋原信息 { stu[a]=stu[b-1]; --iNumOfStu; } void input_student3(int &a,int b)//判斷學號是否重復 { if(a!=0) { int i=0; do { if(stu[a].number==stu[i].number) { printf("此學號代表的學生已錄入\n1、覆蓋原信息\n2、重新輸入\n請選擇："); int c; scanf("%d",&c); switch(c) { case 1: { input_student4(i,iNumOfStu); a=iNumOfStu-1; printf("信息已替換！\n"); break; } case 2: { printf("請重新輸入學生信息：\n"); input_student1(iNumOfStu-1); break; } default: break; } break; } ++i; } while(i<b-1); } } void print_menu(void)//輸出菜單 { printf("======歡迎來到學生信息管理系統======\n"); printf(" 1、輸入學生資料\n"); printf(" 2、刪除學生資料\n"); printf(" 3、查詢學生資料\n"); printf(" 4、修改學生資料\n"); printf(" 5、顯示學生資料\n"); printf(" 6、統計學生成績\n"); printf(" 7、排序學生成績\n"); printf(" 8、保存學生資料\n"); printf(" 9、獲取幫助信息\n"); printf(" 10、退出系統\n"); printf("====================================\n"); printf("請選擇："); } void input_student2(void)//輸入總函數 { char end; printf("請輸入學生信息（在最后一個學生信息錄入完成后以“/”結束錄入）：\n"); for(int i=0;(end=getchar())!='/';i++) { input_student1(i); ++iNumOfStu; input_student3(i,iNumOfStu); } for(int j=0;j<iNumOfStu;j++) { stu[j].average=input_score2(j); } } void input_student1(int a)//輸入學生信息 { printf("學號："); scanf("%d",&stu[a].number); getchar(); printf("姓名："); gets(stu[a].name); printf("數學成績："); scanf("%f",&stu[a].sco.math); printf("英語成績："); scanf("%f",&stu[a].sco.english); printf("計算機成績："); scanf("%f",&stu[a].sco.computer); } float input_score2(int a)//計算學生平均成績 { return (stu[a].sco.math+stu[a].sco.english+stu[a].sco.computer)/3; } void search_student3(int a)//按平均分最高查詢并輸出 { int max=0; for(int i=0;i<a;i++) { if(stu[max].average<stu[i].average) { max=i; } } print_student2(); print_student3(max); } void sort_student2(student s[],int a)//按照數學成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.math>stu[max].sco.math) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student3(student s[],int a)//按照英語成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.english>stu[max].sco.english) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student4(student s[],int a)//按照計算機成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.computer>stu[max].sco.computer) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student5(student s[],int a)//按照平均成績排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].average>stu[max].average) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } int search_student2(int a)//按照學號查找學生并輸出 { int num; int c; printf("請輸入要查詢的學號："); scanf("%d",&num); for(int i=0;i<a;i++) { if(num==stu[i].number) { c=i; } } printf("此學生的信息是：\n"); print_student2(); print_student3(c); return c; } void choosemenu(void)//菜單選擇 { int i; scanf("%d",&i); switch(i) { case 1: { input_student2(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 2: { delete_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 3: { search_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 4: { change_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 5: { print_student1(iNumOfStu); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 6: { input_score1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 7: { sort_student1(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 8: { save_student(stu,iNumOfStu); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 9: { print_help(); printf("按回車鍵返回主菜單"); getchar(); getchar(); menu(); break; } case 10: { exit_student(); } default: break; } } 運行結果： 源文件下載地址： http://115.com/file/clnq138g#一個簡單的學生成績管理系統.rar （請將此地址復制到瀏覽器地址欄中訪問下載頁面） #include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//輸出菜單 void choosemenu(void);//菜單選擇 void input_student1(int);//輸入學生信息 void input_student2(void);//輸入總函數 void input_student3(int &,int);//判斷學號是否重復 void input_student4(int,int);//覆蓋原信息 void sort_student3(student s[],int);//按照英語成績排序 void sort_student4(student s[],int);//按照計算機成績排序 void sort_student2(student s[],int);//按照數學成績排序 void sort_student5(student s[],int);//按照平均成績排序 float input_score2(int);//計算學生平均成績 void print_student2(void);//顯示表頭 void print_student3(int);//顯示學生信息 void print_student1(int);//顯示全部學生資料 void sort_student1(void);//排序總函數 void menu(void);//菜單調度總函數 int search_student2(int);//按學號查詢學生信息并輸出 void search_student3(int);//按平均分最高查詢并輸出 void search_student1(void);//查詢總函數 void delete_student2(int,int);//刪除學生信息 void delete_student1(void);//刪除總函數 void change_student2(int);//修改學生資料 void change_student1(void);//修改總函數 void input_score3(int);//統計成績 void input_score1(void);//統計成績總函數 void print_help(void);//輸出幫助信息 void exit_student(void);//退出系統 void save_student(student *,int);//保存學生信息 void main() { menu(); } void save_student(student *s,int a)//保存學生信息 { FILE *fp; if((fp=fopen("d:\\學生信息.txt","wb"))==NULL) { printf("不能打開文件！\n"); } else { printf("保存信息到D盤\n"); fprintf(fp,"本班所有學生具體信息如下：\r\n"); fprintf(fp," 學號 姓名 數學成績 英語成績 計算機成績 平均成績\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系統 { exit(1); } void print_help(void)//輸出幫助信息 { printf("本系統所能容納的最大學生數為%d人\n學生信息保存在D盤根目錄下，保存文件為“學生信息.txt”。\n感謝使用！\n",N); } void input_score1(void)//統計成績總函數 { int c; c=search_student2(iNumOfStu); printf("學號：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成績錄入成功！
標簽： c語言
上傳時間： 2019-06-09
上傳用戶：啊的撒旦
