Incrementing minutes for 12hour time?

[Warcom]

Hello I am trying to take input from user for a given 12 hour clock time, then ask how many minutes to add to it, then print increments of each minute until the sum of those minutes is reached. I am having trouble with incrementing to the neccessary hour. Any ideas?

#include <stdio.h>
main()
{
        int addtime,stophr,stopmin,hr=12,min=0;




        printf("How many minutes do you want to add?");
        scanf("%d",&addtime);
        stophr=(min + addtime/60) + hr;
        stopmin=(min + addtime)%60;
        if(stophr>12)
        {
        stophr=stophr-12;
        }
        if(stopmin>59)
        {
        stopmin=stopmin-60;
        }
        printf("%d:%.02d\n",hr,min);
        while(hr!=stophr && min!=stopmin)
        {
                min++;
        if(hr>12)
        {
        hr=hr-12;
        }
        if(min>59)
        {
        hr=hr+1;
        min=0;
        }


        printf("%d:%.02d\n",hr,min);
        }


        printf("%d:%.02d\n",stophr,stopmin);
}