判斷是不是回文數

 1 //題目：一個5位數，判斷它是不是回文數。即12321是回文數，個位與萬位相同，十位與千位相同。　
 2 #include <stdio.h>
 3
 4 int main()
 5 {
 6     int num=0;
 7     printf("please input a int num:");
 8     do{
 9         if(num!=0)
10         {
11             if(num<10000)
12                 printf("so,input a bigger one:");
13             else
14                 printf("so ,input a smaller one:");
15         }
16         scanf("%d",&num);
17     }while(num>99999||num<10000);
18
19     if((num/10000==num%10) && (num/1000%10==num%100/10))
20         printf("Yes,it is!\n");
21
22     else
23         printf("No,it isn't!\n");
24
25     return 0;
26 }
 

 




摘自 zhengmian