Write a program to output all palindromic times displayed by a 24 hour digital clock (e.g. 13:31)

Question

I am attempting to write a program that will output all palindromic times show below using C-Programming:

00:00
01:10
02:20
03:30
04:40
05:50
10:01
11:11
12:21
13:31
14:41
15:51
20:02
21:12
22:22
23:32

I know to treat the hours and the minutes as two separate variables rather than as an actual time. Also there will be a few counters to increment the hours and minutes but not sure exactly where to head any ideas is much appreciated?

Answer 1

This is the perfect answer you want

    #include <stdio.h>

int pallindrome(int loop)
{
    if (loop >= 10)
    {
        int temp, temp1 = 0, sum = 0;
        for(temp = 0; temp < 2;temp++)
        {
            temp1 = loop % 10;
            loop = loop / 10;
            sum = sum * 10 + temp1;
        }
        return(sum);
    }
    else
    {
        return(loop * 10);
    }
}
int main(void) {
    // your code goes here
    int a=0;
    int loop=0;
    for (loop=0; loop<=59; loop++)
    {
        a = pallindrome(loop);
        if (a < 60)
        printf("%.2d:%.2d\n", loop,a);  
    }
    return 0;
}

See the output here: http://ideone.com/54ouHv