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  1. #include<stdio.h>
  2. int main(){
  3.     int a,b=0,n,sign=1,c;
  4.     scanf("%d",&n);
  5.     c=n;
  6.     if(n<=0){
  7.         n=-1*n;sign=-1;
  8.     }
  9.     while(n!=0){
  10.         a=n%10;
  11.         n=n/10;
  12.         b=10*b+a;
  13.         }
  14.     b=sign*b;
  15.     if(b==c&&c>=0){
  16.         printf("%d是回文数",c);
  17.     }
  18.     else{
  19.         printf("%d不是回文数",c);
  20.     }
  21.     return 0;
  22. }
Success #stdin #stdout 0s 5316KB
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stdin
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12321
stdout
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12321是回文数
https://ideone.com/KpBnxv
language:
C (clang 8.0)
created:
10 hours ago
visibility:
public

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