Lesson 10 Activity 3

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

void displayMenu(); // function for menu

int area(int); // argument for circle
int area(int,int); // argument for square
float area(float); // argument for rectangle
float area(float,float,float); // argument for triangle

// *******************************
//* Main
//* Ask for the dimensions of the shape
//*
//*******************************/
int main()
{
    int choice; // menu choice

    int s,l,w; // intergers for sides of square and length and width of a rectangle
    float r,A,B,C; // floats for radius and the 3 sides for triangle

    displayMenu();
    cin >> choice; //getting the choices from menu and getting all varibles from user
    if (choice == 1)
    {
    cout<<"Enter the radius of the circle:";
    cin>>r;
    }
    else if (choice ==2)
    {
    cout<<"Enter the sides of a the square:";
    cin>>s;
    }
    else if (choice ==3)
    {
    cout<<"Enter the length and width of the rectangle:";
    cin>>l>>w;
    }
    else if (choice ==4)
    {
    cout << "Length of sides must be positive and sum of any two sides" << endl;
    cout << "must be smaller than third side." << endl;
    cout<<"Enter all 3 sides of the triangle:";
    cin>>A>>B>>C;
    }
    // couts for all the areas
    cout<<"\nArea of circle is "<<area(r);
    cout<<"\nArea of square is "<<area(s);
    cout<<"\nArea of rectangle is "<<area(l,w);
    cout<<"\nArea of triangle is "<<area(A,B,C);
    return 0;
}

// finding areas for shapes
float area(float r)
{
    return(3.14*r*r); // area for circle
}
int area(int s)
{
    return(s*s); // area for square
}
int area(int l,int w)
{
    return(l*w); // area for rectangle
}
float area(float A,float B, float C)
{
float s = (A+B+C)/2; // area for triangle
    return sqrt(s*(s-A)*(s-B)*(s-C));
}

//********************
//* Menu function
//* Ask the user witch shape to find area of
//******************
void displayMenu()
{
    cout << "Please choose a shape you want to find the area" << endl;
    cout << "1. Circle" << endl;
    cout << "2. Square" << endl;
    cout << "3. Rectangle" << endl;
    cout << "4. Triangle" << endl;
}