polal.cpp

#include <iostream>

using namespace std;

int main() {
    while(true) {
        cout 
            << "Pola powierzchnii figur" << endl
            << "1 - prostokat" << endl
            << "2 - kolo" << endl
            << "3 - trojkat" << endl
            << "4 - trapez" << endl
            << "5 - koniec programu" << endl;
            
        int o = 0;
        cin >> o;
        switch(o) {
            case 1: {
                float a; cout << "a:"; cin >> a;
                float b; cout << "b:"; cin >> b;
                cout << "pole: " << a * b << endl;
            } break;
            
            case 2: {
                float r; cout << "Podaj promien kola: "; cin >> r;
                cout << "pole: " << 3.14 * r * r << endl;
            } break;
                
            case 3: {
                float a; cout << "a:"; cin >> a;
                float h; cout << "h:"; cin >> h;
                cout << "pole: " << 1.f / 2.f * a * h << endl;
            } break;
                
            case 4: {
                float a; cout << "a:"; cin >> a;
                float b; cout << "b:"; cin >> b;
                float h; cout << "h:"; cin >> h;
                cout << "pole: " << (a + b) * h / 2.f << endl;
            } break;
            
            default:
                return 1;
        }
        cin.get();
        cout << endl;
    }
    return 1;
}