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#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
// Declared Variables
const double PI = 3.141592;
int radius, base, width, lengthTop, lengthBottom, height, shape;
char displayMenu(int shape);
double calcCircleArea(double radius);
double calcRectangleArea(double width, double height);
double calcTriangleArea(double base, double height);
double calcTrapezoidArea(double lengthTop, double lengthBottom, double height);
double CircleArea;
double RectangleArea;
double TrapezoidArea;
double TriangleArea;
do {
// Menu start
cout << "Shape Menu" << endl;
cout << "[C]ircle" << endl;
cout << "[R]ectangle" << endl;
cout << "[T]riangle" << endl;
cout << "Tra[p]ezoid" << endl;
cout << "[Q]uit" << endl;
// Prompts user for upper case letter of Shape defined in menu
cout << "Shape (C, R, T, P, or Q)?" << endl;
cin >> shape;
// In the case of C run the circle area equation
switch (shape) {
case 'c':
case 'C':
//Prompt user for Radius
cout << "Radius? " << endl;
cin >> radius;
// Run circle area equation
CircleArea = PI * radius * radius;
// Display the area to the user in square units.
cout << "The area of your shape is " << CircleArea << " square units."
<< endl;
break;
// In the case of R run the rectangle area equation
case 'r':
case 'R':
// Prompt user for the width
cout << "Width? ";
cin >> width;
// Prompt user for the for the length
cout << "Length? ";
cin >> height;
// Run rectangle area equation
RectangleArea = width * height;
// Display the area in square units
cout << "The area of your shape is " << RectangleArea << " square units."
<< endl;
break;
// In the case of T run the triangle area equation
case 't':
case 'T':
// Prompt the user for the base of the triangle
cout << "Base? ";
cin >> base;
// Prompt the user for the height of the triangle
cout << "Height? ";
cin >> height;
TriangleArea = 0.5 * base * height;
cout << "The area of your shape is " << TriangleArea << " square unit."
<< endl;
break;
// In the case of P run the trapezoid area equation
case 'p':
case 'P':
// Prompt the user for the base of the trapezoid
cout << "Length of the top? ";
cin >> lengthTop;
// Prompt the user for the top of the trapezoid
cout << "Length of the bottom? ";
cin >> lengthBottom;
//Prompt the user for the height of the trapezoid
cout << "Height? ";
cin >> height;
// Run the area equation for the trapezoid
TrapezoidArea = 0.5 * (lengthBottom + lengthTop) * height;
// Display the trapezoid area in square units
cout << "The area of your shape " << TrapezoidArea << " square units."
<< endl;
// If the input by the user is wrong and does not meet requirements this text will be displayed
break;
case 'q':
case 'Q':
// Prompt the user for the base of the triangle
cout << "Good-bye!" << endl;
break;
default:
cout << shape << " is an invalid menu option, program terminated."
<< endl; // outputs if user enters wrong variable
}
} while (shape != 'Q');
// End of program
return 0;
}
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