C++ Program to Calculate Difference Between Two Time Period

#include <iostream>
using namespace std;
struct Time {
  int hour;
  int mins;
  int secs;
};
Time findTimeDifference(Time t1, Time t2);
int main() {
    Time t1, t2, diff;
    cout << "Enter earlier time in hours, minutes and seconds\n";
    cin >> t1.hour >> t1.mins >> t1.secs;
    cout << "Enter current time in hours, minutes and seconds\n";
    cin >> t2.hour >> t2.mins >> t2.secs;
    diff = findTimeDifference(t1, t2);
    cout << "Difference = "<< diff.hour << ":" << diff.mins << ":" << diff.secs;
    return 0;
}
Time findTimeDifference(Time t1, Time t2){
 Time diff;
    if(t2.secs > t1.secs){
        --t1.mins;
        t1.secs += 60;
    }
    diff.secs = t1.secs - t2.secs;
    if(t2.mins > t1.mins) {
        --t1.hour;
        t1.mins += 60;
    }
    diff.mins = t1.mins-t2.mins;
    diff.hour = t1.hour-t2.hour;
    return diff;
}