#include <iostream>
#include <string>
using namespace std;
void displayHeader();
void displayMenu();
void calculateCircle(double x);
void calculateTriangle(double h,double s1, double s2, double s3);
void calculateSquare (double s);
void calculateRectangle(double w ,double l);
void displayResult(double x, double y, string shape);


int main()
{
	int answer;

	displayHeader();
	displayMenu();

	cin >> answer;

	switch (answer)
	{
	case 1: // circle

    	double radius;
    	cout << "Enter radius of circle " << endl;
    	cin >> radius;
		calculateCircle(radius);
		break;

	case 2: // triangle
	    double tHeight;
	    double s1;
	    double s2;
	    double s3;
	    cout << "Enter height of triangle " << endl;
	    cin >> tHeight;
	    cout << "Enter side1 of triangle " << endl;
	    cin >> s1;
	    cout << "Enter side2 of triangle " << endl;
	    cin >> s2;
	    cout << "Enter side3 of triangle " << endl;
	    cin >> s3;
	    calculateTriangle(tHeight,s1, s2,s3);
		break;
	case 3: // square
	    double side;
	    cout << "Enter side of square " << endl;
	    cin >> side;
	calculateSquare(side);
		break;
	case 4: // rectangle
	    double rHeight;
	    double width;
	    cout << "Enter width of rectangle " << endl;
	    cin >> width;
	    cout << "Enter height of rectangle " << endl;
	    cin >> rHeight;
		calculateRectangle(width, rHeight);
		break;
	case 5:
	    cout << "BYEEEEEEEee" << endl;
		break;
	default:
		cout << "Bad choice! Please try again later.\n";
	}


	return 0;
}

void displayHeader() {
	//cout << "******************************************************************" << endl;//
	cout << "Welcome to the Circumference and Surface Area Calculator!" << endl;
	cout << "******************************************************************" << endl;
}
void displayMenu() {
	cout << "Here are some shapes you could use to calculate the circumference and surface area" << endl;
	cout << "1 - Circle\n";
	cout << "2 - Triangle\n";
	cout << "3 - Square\n";
	cout << "4 - Rectangle\n";
	cout << "Quit\n";
}
void calculateCircle(double r)
{
	double circumference  = 2 * 3.14 * r;
    double surfaceArea = 3.14 * (r * r);
	displayResult(circumference, surfaceArea, "circle");
}
void calculateTriangle(double h,double s1, double s2, double s3){
    double circumference  = s1 + s2 + s3;
    double surfaceArea = (h * s1) / 2;
    displayResult(circumference, surfaceArea, "triangle");
}
void calculateSquare(double s){
    double circumference  = s * 4;
    double surfaceArea = s *s;
    displayResult(circumference, surfaceArea, "square");
}

void calculateRectangle(double w ,double l){
    double circumference  = 2 * (w + l);
    double surfaceArea = w * l;
    displayResult(circumference, surfaceArea,"rectangle");
}
void displayResult(double c, double s, string shape){
    cout << "The circumference of the " << shape << " is " << c << endl;
    cout << "The surface area of the " << shape << " is " << s << endl;
}