#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
    int original;

    do{
        printf("Enter a two-digit number:");
        scanf("%d",&original);

        int ten=original/10;
        int ge=original%10;

        printf("The reversal is %d%d\n",ge,ten);
    }while(original!=999);

    return 0;
}

Enter a two-digit number:25
The reversal is 52
Enter a two-digit number:16
The reversal is 61
Enter a two-digit number:96
The reversal is 69
Enter a two-digit number:19
The reversal is 91