逆转一个整数

//逆转一个整数,如123->321
#include<stdio.h>
#include<stdlib.h>

int main(int argc, char *argv[])
{
    int ival;
    int sum;
    while(printf("input the number:
"),scanf_s("%d",&ival) == 1)
    {
        sum = 0;
        while(ival)
        {
            sum = sum * 10 + ival % 10;
            ival /= 10;
        }
        printf("The reverse number is:%d
",sum);
    }
    system("pause");
    return 0;
}