C++ program to calculate area of a circle,a rectangle or a triangle depending upon user's choice

#include<iostream.h>#include<conio.h>#include<math.h> void main(){ clrscr(); //to clear the screen float a,b,c,s,r,area; int ch; cout<<“***Menu***n1.Area of circlen2.Area of Rectangle”; cout<<“n3.Area of trianglenEnter your choice:”; cin>>ch; switch(ch) { case 1: { cout<<“nEnter radius of the circle:”; cin>>r; area=3.14*r*r; break; } case 2: { cout<<“nEnter length and breadth:”; cin>>a>>b; area=a*b; break; } case 3: { cout<<“nEnter three sides of …

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