判断一个数是否是回文数

回文数：121

#include <stdio.h>

int main() {
    int val;
    int sum = 0;
    printf("请输入val：\n");
    scanf("%d",&val);

    int m = val;
    while (m){
        sum = sum * 10 + m % 10;
        m /= 10;
    }

    if(val == sum){
        printf("yes \n");
    } else{
        printf("no \n");

    }

    return 0;
}