AreaOfFigures

// AreaOfFigures.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

int main()
{
    double area;
    string geometry_figure = "square";
    string geometry_figure = "rectangle";
    string geometry_figure = "circle";
    string geometry_figure = "triangle";
    cin >> geometry_figure;

    if (geometry_figure == "square")
    {
        double side_a;
        cin >> side_a;
        area = side_a * side_a;
    }
    else if (geometry_figure == "rectangle")
    {
        double side_b, side_c;
        cin >> side_b >> side_c;
        area = side_b * side_c;
    }
    else if (geometry_figure == "circle")
    {
        double radius;
        double pi = 3.14159265359;
        cin >> radius;
        area = (pi * radius * radius);
    }
    else  if (geometry_figure == "triangle")
    {
        double width, hight;
        cin >> width, hight;
        area = (width * hight) / 2;
    }

    cout << fixed << setprecision(3) << area << endl;

    return 0;
}