Question

How to calculate add X% to Y in C++

Answer 1

#include <iostream>

double addPercent(double percent, double value) {
    return value * (1.0 + percent / 100.0);
}

int main() {
    double value = 360;
    double percent = 12;

    double result = addPercent(percent, value);

    std::cout << "Adding " << percent << "% to " << value
         << " gives " << result << std::endl;
}



/*
run:

Adding 12% to 360 gives 403.2

*/

 

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