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color=#3300cc>經典c程序100例==71--80</FONT></FONT></B></FONT></P>
<P><FONT
color=#990000>【程序71】</FONT><BR>題目：編寫input()和output()函數輸入，輸出5個學生的數據記錄。<BR>1.程序分析：<BR>2.程序源代碼：<BR>#define
N 5<BR>struct student<BR>{ char num[6];<BR> char
name[8];<BR> int score[4];<BR>}
stu[N];<BR>input(stu)<BR>struct student
stu[];<BR>{ int i,j;<BR> for(i=0;i<N;i++)<BR> {
printf("\n please input %d of
%d\n",i+1,N);<BR> printf("num:
");<BR> scanf("%s",stu[i].num);<BR> printf("name:
");<BR> scanf("%s",stu[i].name);<BR> for(j=0;j<3;j++)<BR> {
printf("score
%d.",j+1);<BR> scanf("%d",&stu[i].score[j]);<BR> }<BR> printf("\n");<BR> }<BR>}<BR>print(stu)<BR>struct
student stu[];<BR>{ int i,j;<BR>printf("\nNo. Name
Sco1 Sco2 Sco3\n");<BR>for(i=0;i<N;i++)<BR>{
printf("%-6s%-10s",stu[i].num,stu[i].name);<BR> for(j=0;j<3;j++)<BR> printf("%-8d",stu[i].score[j]);<BR> printf("\n");<BR>}<BR>}<BR>main()<BR>{<BR> input();<BR> print();<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序72】</FONT><BR>題目：創建一個鏈表。<BR>1.程序分析： <BR>2.程序源代碼：<BR>/*creat
a list*/<BR>#include "stdlib.h"<BR>#include
"stdio.h"<BR>struct list<BR>{ int data;<BR>struct
list *next;<BR>};<BR>typedef struct list
node;<BR>typedef node *link;<BR>void main()<BR>{
link ptr,head;<BR>int
num,i;<BR>ptr=(link)malloc(sizeof(node));<BR>ptr=head;<BR>printf("please
input 5
numbers==>\n");<BR>for(i=0;i<=4;i++)<BR>{<BR> scanf("%d",&num);<BR> ptr->data=num;<BR> ptr->next=(link)malloc(sizeof(node));<BR> if(i==4)
ptr->next=NULL;<BR> else
ptr=ptr->next;<BR>}<BR>ptr=head;<BR>while(ptr!=NULL)<BR>{
printf("The value is
==>%d\n",ptr->data);<BR> ptr=ptr->next;<BR>}<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序73】</FONT><BR>題目：反向輸出一個鏈表。 <BR>1.程序分析：<BR>2.程序源代碼：<BR>/*reverse
output a list*/<BR>#include "stdlib.h"<BR>#include
"stdio.h"<BR>struct list<BR>{ int data;<BR> struct
list *next;<BR>};<BR>typedef struct list
node;<BR>typedef node *link;<BR>void main()<BR>{
link ptr,head,tail; <BR> int
num,i;<BR> tail=(link)malloc(sizeof(node));<BR> tail->next=NULL;<BR> ptr=tail;<BR> printf("\nplease
input 5
data==>\n");<BR> for(i=0;i<=4;i++)<BR> {<BR> scanf("%d",&num);<BR> ptr->data=num;<BR> head=(link)malloc(sizeof(node));<BR> head->next=ptr;<BR> ptr=head;<BR> }<BR>ptr=ptr->next;<BR>while(ptr!=NULL)<BR>{
printf("The value is
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