c语言回文数

int main(void)
{
    int m, val,sum = 0;
    printf("请输入数字:");
    scanf("%d",&val);
    m = val;
    while (m)
    {
        sum=sum*10+m%10;
        m/=10;
    }
    if(sum==val)
        printf("Yes!\n");
    else
        printf("NO!\n");
    return 0;

}