Laba_5

#include "pch.h"
#include <iostream>

using namespace std;

class Triangle
{
public:
    float S(float a, float b, float c, float R) {
        return a * b * c * R / 4;
    }
};

int main()
{
    int a, b, c, R;
    Triangle Triangle1;
    cout << "Enter a, b, c, R: ";
    cin >> a; cin >> b; cin >> c; cin >> R;
    cout << Triangle1.S(a, b, c, R) << endl;

    return 0;
}