Question

For C Programming:

Write a program that reads two times in military format (e.g. 0900, 1730), and prints the number of hours and minutes between the two times. 
Assume that the hours and minutes of the second time are greater than the first time.
See an example below. User input is underlined (your program does not have to underline the user input).

Please enter the first time: 0900
                             ----
Please enter the second time: 1730
                              ----
8 hours 30 minutes

Answer 1

#include <stdio.h>

int main() {
    int first, second, hours, minutes;
    printf("Please enter the first time: ");
    scanf("%d", &first);
    printf("Please enter the second time: ");
    scanf("%d", &second);
    if (first > second) {
        hours = (first / 100) - (second / 100);
        minutes = (first % 100) - (second % 100);
        minutes = 24 * 60 - (hours * 60 + minutes);
        hours = minutes / 60;
        minutes %= 60;
    } else {
        hours = (second / 100) - (first / 100);
        minutes = (second % 100) - (first % 100);
    }
    printf("%d hours %d minutes\n", hours, minutes);
    return 0;
}