cppCallCost

#include <iostream>

int main()
{
    const int kopInGrn{ 100 };
    const int secInMin{ 60 };

    double minuteCostGrn{1};
    int callTimeMin{ 1 };
    int callTimeSec{ 30 };

    std::cout << "Enter call cost per minute in Grn\n";
    std::cin >> minuteCostGrn;

    std::cout << "Enter call duration, minutes\n";
    std::cin >> callTimeMin;

    std::cout << "Enter call duration, seconds\n";
    std::cin >> callTimeSec;

    double callCostTotal = (callTimeMin + callTimeSec / (double)secInMin) * minuteCostGrn;

    std::cout << "Total call cost: " << (int)callCostTotal << " grn. " << (int)(callCostTotal * kopInGrn) % kopInGrn << " kop\n";
}