PROGRAM TO IMPLEMEMT SWITCH STATEMENT

//PROGRAM TO IMPLEMEMT SWITCH STATEMENT
/*MADE BY KRISHNA AGARWAL*/
#include<iostream>
#include<math.h>
using namespace std;
int main()
{
    int a,c,n;
    float l,b,d,p,area_square,area_rect,area_triangle,s;
    cout<<"PRESS 1 FOR AREA OF RECTANGLE\n"<<"PRESS 2 FOR AREA OF TRIANGLE\n"<<"PRESS 3 FOR AREA OF SQUARE\n";
    cin>>n;
    switch(n)
    {
        case 1:
            cout<<"ENTER THE LENGTH AND BREADTH OF THE RECTANGLE\n";
            cin>>l>>b;
            area_rect=l*b;
            cout<<"THE AREA OF THE RECTANGLE IS \n"<<area_rect;
            break;
        case 2:
            cout<<"ENTER THE THREE SIDES OF TRIANGLE : \n";
            cin>>a>>b>>c;
            s=(a+b+c)/2;
            p=s*(s-a)*(s-b)*(s-c);
            area_triangle=sqrt(p);
            cout<<"THE AREA OF THE TRAINGLE IS : \n"<<area_triangle;
            break;
        case 3:
            cout<<"ENTER THE SIDE OF A SQUARE\n";
            cin>>d;
            area_square=d*d;
            cout<<"THE AREA OF THE SQUARE IS : \n"<<area_square;
            break;
    }
    return 0;
}