Find the Total Minutes between 2 Time Given in 24-hour Format using C++

#include <bits/stdc++.h>

using namespace std;

int main() {
    string time1, time2;
    cin >> time1 >> time2;
    double x_hours = stoi(time1.substr(0, 2));
    double x_mins = stoi(time1.substr(3, 2));
    double y_hours = stoi(time2.substr(0, 2));
    double y_mins = stoi(time2.substr(3, 2));
    double minutes_between = (60 - y_mins) + (60 * (x_hours - (y_hours + 1))) + x_mins;
    cout << minutes_between << " minutes" << endl;
    return 0;
}