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1. 下列說法正確的是 （ ）
A. Java語言不區分大小寫
B. Java程序以類為基本單位
C. JVM為Java虛擬機JVM的英文縮寫
D. 運行Java程序需要先安裝JDK
2. 下列說法中錯誤的是 ( )
A. Java語言是編譯執行的
B. Java中使用了多進程技術
C. Java的單行注視以//開頭
D. Java語言具有很高的安全性
3. 下面不屬于Java語言特點的一項是( )
A. 安全性
B. 分布式
C. 移植性
D. 編譯執行
4. 下列語句中，正確的項是 ( )
A . int $e,a,b=10
B. char c,d=’a’
C. float e=0.0d
D. double c=0.0f
標簽：
Java
A.
B.
C.
上傳時間：
2017-01-04
上傳用戶：netwolf
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特點(FEATURES) 精確度0.1%滿刻度 (Accuracy 0.1%F.S.) 可作各式數學演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A| (Math functioA+B/A-B/AxB/A/B/A&B(Hi&Lo)/|A|/etc.....) 16 BIT 類比輸出功能(16 bit DAC isolating analog output function) 輸入/輸出1/輸出2絕緣耐壓2仟伏特/1分鐘(Dielectric strength 2KVac/1min. (input/output1/output2/power)) 寬范圍交直流兩用電源設計(Wide input range for auxiliary power) 尺寸小,穩定性高(Dimension small and High stability)
標簽：
微電腦
數學演算
輸出
隔離傳送器
上傳時間：
2013-11-24
上傳用戶：541657925
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數字運算，判斷一個數是否接近素數
A Niven number is a number such that the sum of its digits divides itself. For example, 111 is a Niven number because the sum of its digits is 3, which divides 111. We can also specify a number in another base b, and a number in base b is a Niven number if the sum of its digits divides its value.
Given b (2 <= b <= 10) and a number in base b, determine whether it is a Niven number or not.
Input
Each line of input contains the base b, followed by a string of digits representing a positive integer in that base. There are no leading zeroes. The input is terminated by a line consisting of 0 alone.
Output
For each case, print "yes" on a line if the given number is a Niven number, and "no" otherwise.
Sample Input
10 111
2 110
10 123
6 1000
8 2314
0
Sample Output
yes
yes
no
yes
no
標簽：
數字
運算
上傳時間：
2015-05-21
上傳用戶：daguda
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The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d .
Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet.
Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1.
Definition
標簽：
government
streamline
important
alphabet
上傳時間：
2015-06-09
上傳用戶：weixiao99
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The XML Toolbox converts MATLAB data types (such as double, char, struct, complex, sparse, logical) of any level of nesting to XML format and vice versa.
For example,
>> project.name = MyProject
>> project.id = 1234
>> project.param.a = 3.1415
>> project.param.b = 42
becomes with str=xml_format(project, off )
"<project>
<name>MyProject</name>
<id>1234</id>
<param>
<a>3.1415</a>
<b>42</b>
</param>
</project>"
On the other hand, if an XML string XStr is given, this can be converted easily to a MATLAB data type or structure V with the command V=xml_parse(XStr).
標簽：
converts
Toolbox
complex
logical
上傳時間：
2016-02-12
上傳用戶：a673761058
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DBDesigner 4 is a database design system that integrates database design, modelling, creation and maintenance into a single, seamless environment
標簽：
database
design
DBDesigner
integrates
上傳時間：
2014-01-05
上傳用戶：csgcd001
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特點： 精確度0.1%滿刻度 可作各式數學演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A|/ 16 BIT類比輸出功能 輸入與輸出絕緣耐壓2仟伏特/1分鐘(input/output/power) 寬范圍交直流兩用電源設計 尺寸小,穩定性高
標簽：
微電腦
數學演算
隔離傳送器
上傳時間：
2014-12-23
上傳用戶：ydd3625
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/*--------- 8051內核特殊功能寄存器 -------------*/
sfr ACC = 0xE0; //累加器
sfr B = 0xF0; //B 寄存器
sfr PSW = 0xD0; //程序狀態字寄存器
sbit CY = PSW^7; //進位標志位
sbit AC = PSW^6; //輔助進位標志位
sbit F0 = PSW^5; //用戶標志位0
sbit RS1 = PSW^4; //工作寄存器組選擇控制位
sbit RS0 = PSW^3; //工作寄存器組選擇控制位
sbit OV = PSW^2; //溢出標志位
sbit F1 = PSW^1; //用戶標志位1
sbit P = PSW^0; //奇偶標志位
sfr SP = 0x81; //堆棧指針寄存器
sfr DPL = 0x82; //數據指針0低字節
sfr DPH = 0x83; //數據指針0高字節
/*------------ 系統管理特殊功能寄存器 -------------*/
sfr PCON = 0x87; //電源控制寄存器
sfr AUXR = 0x8E; //輔助寄存器
sfr AUXR1 = 0xA2; //輔助寄存器1
sfr WAKE_CLKO = 0x8F; //時鐘輸出和喚醒控制寄存器
sfr CLK_DIV = 0x97; //時鐘分頻控制寄存器
sfr BUS_SPEED = 0xA1; //總線速度控制寄存器
/*----------- 中斷控制特殊功能寄存器 --------------*/
sfr IE = 0xA8; //中斷允許寄存器
sbit EA = IE^7; //總中斷允許位
sbit ELVD = IE^6; //低電壓檢測中斷控制位
8051
標簽：
80C51
特殊功能寄存器
地址
上傳時間：
2013-10-30
上傳用戶：yxgi5
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TLC2543是TI公司的12位串行模數轉換器，使用開關電容逐次逼近技術完成A/D轉換過程。由于是串行輸入結構，能夠節省51系列單片機I/O資源；且價格適中，分辨率較高，因此在儀器儀表中有較為廣泛的應用。
TLC2543的特點
（1）12位分辯率A/D轉換器；
（2）在工作溫度范圍內10μs轉換時間；
（3）11個模擬輸入通道；
（4）3路內置自測試方式；
（5）采樣率為66kbps；
（6）線性誤差±1LSBmax；
（7）有轉換結束輸出EOC；
（8）具有單、雙極性輸出；
（9）可編程的MSB或LSB前導；
（10）可編程輸出數據長度。
TLC2543的引腳排列及說明
TLC2543有兩種封裝形式：DB、DW或N封裝以及FN封裝，這兩種封裝的引腳排列如圖1，引腳說明見表1
TLC2543電路圖和程序欣賞
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit clock=P1^0; sbit d_in=P1^1;
sbit d_out=P1^2;
sbit _cs=P1^3;
uchar a1,b1,c1,d1;
float sum,sum1;
double sum_final1;
double sum_final;
uchar duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar wei[]={0xf7,0xfb,0xfd,0xfe};
void delay(unsigned char b) //50us
{
unsigned char a;
for(;b>0;b--)
for(a=22;a>0;a--);
}
void display(uchar a,uchar b,uchar c,uchar d)
{
P0=duan[a]|0x80;
P2=wei[0];
delay(5);
P2=0xff;
P0=duan[b];
P2=wei[1];
delay(5);
P2=0xff;
P0=duan[c];
P2=wei[2];
delay(5);
P2=0xff;
P0=duan[d];
P2=wei[3];
delay(5);
P2=0xff;
}
uint read(uchar port)
{
uchar i,al=0,ah=0;
unsigned long ad;
clock=0;
_cs=0;
port<<=4;
for(i=0;i<4;i++)
{
d_in=port&0x80;
clock=1;
clock=0;
port<<=1;
}
d_in=0;
for(i=0;i<8;i++)
{
clock=1;
clock=0;
}
_cs=1;
delay(5);
_cs=0;
for(i=0;i<4;i++)
{
clock=1;
ah<<=1;
if(d_out)ah|=0x01;
clock=0;
}
for(i=0;i<8;i++)
{
clock=1;
al<<=1;
if(d_out) al|=0x01;
clock=0;
}
_cs=1;
ad=(uint)ah;
ad<<=8;
ad|=al;
return(ad);
}
void main()
{
uchar j;
sum=0;sum1=0;
sum_final=0;
sum_final1=0;
while(1)
{
for(j=0;j<128;j++)
{
sum1+=read(1);
display(a1,b1,c1,d1);
}
sum=sum1/128;
sum1=0;
sum_final1=(sum/4095)*5;
sum_final=sum_final1*1000;
a1=(int)sum_final/1000;
b1=(int)sum_final%1000/100;
c1=(int)sum_final%1000%100/10;
d1=(int)sum_final%10;
display(a1,b1,c1,d1);
}
}
標簽：
2543
TLC
上傳時間：
2013-11-19
上傳用戶：shen1230
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#include<iom16v.h>
#include<macros.h>
#define uint unsigned int
#define uchar unsigned char
uint a,b,c,d=0;
void delay(c)
{ for for(a=0;a<c;a++)
for(b=0;b<12;b++);
};
uchar tab[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
標簽：
AVR
單片機
數碼管
上傳時間：
2013-10-21
上傳用戶：13788529953
