#include <iostream>
#include <iomanip>
using namespace std;
 
int main()
{
 
int choice;
double a,r,l,w;
const double z = 3.14159;
const double k = .5;
 
cout<<"Which would you like to do?/n";
cout<<"Enter 1 for area of a circle/n";
cout<<"Enter 2 for area of a rectangle/n";
cout<<"Enter 3 for area of a Triangle/n";
cout<<"Enter 4 if you are a nancy/n";
cin >> choice;
 
if(choice>=1 && choice<=3)
    {
 
switch(choice)
            {
    case 1: cout<<"What is the radius?/n";
            cin << r;
            a=z*(r*r);
            cout<<"The area equals " <<a;
            break;
    case 2:    cout<<"What are the width and legnth of the rectangle?/n";
            cin>> w >> l;
            a=l*w;
            cout <<"The area equals " <<a;
            break;
    case 3:    cout<<"What are the base and height of the triagnle?/n";
            cin>> l >> w;
            a=l*w*k;
            cout<<"The area euqals "<<a;
 
        case 4: break;
                        }    
    }
 
else if (x!=4)
        {
    cout<<"That's not a choice, re-run the program";
        }
 
 
 
system("pause");
return 0;
}