#include <iostream>

using namespace std;
                    //This is prototyping the functions for later when the if statement calls for a function.
int triangle();
int circle();
int square();

int main()
{
    cout << "Welcome to my area calculator,\n please select a shape using the numbers as a selection.\n\n" << "1.Triangle\n2.Circle\n3.Square\n";
    int selection;
    cin >> selection;
 cout << endl;


    if (selection == 2){
    circle();
    }

    if (selection>3){           //This if statement checks if the selection is valid or not, currently works for numbers but not text.

        cout << "Sorry that wasn't one of the options.";

    main();
    }

                        //the if statements below check which shape was selected to begin the calculation.
    if(selection == 1){
    triangle();
    }

    if (selection == 2){
    circle();
    }

    if (selection == 3){
    square();
    }

    return 0;
}

//Below are the functions for each calculations
int triangle(){

    int base;
    int height;
cout << "Please enter the base length of your triangle : ";
cin >> base;
cout << " \n\nPlease enter the Height of your triangle : ";
cin >> height;
cout << "The area of the triangle is : ";

int triangle;
triangle = (height + base) / 2;

cout << triangle;

return triangle;


}

int circle(){
int radius;
cout << "Please enter the radius of the circle : ";
cin >> radius;
cout << "\n\nThe area of the circle is : ";

double circle;
circle = 3.14 * radius * radius;
cout << circle;

return circle;

}


int square(){

double width;
double height;
cout << "Please enter the height of your square : ";
cin >> height;

cout << "\n\nPlease enter the width of your square : ";
cin >> width;

int square;
square = width * height;
cout << "\n\nThe area of the square is : " << square;

return square;

}