Write a program to calculate the area of different shapes (circle, square, triangle, rectangle) using function overloading.

Coding:

#include<iostream.h>

#include<math.h>

#include<conio.h>

#define PI 3.141

class Shape

{

 float a;

 public:

    void area(int r);

    void area(float s);

    void area(float l,float b);

    void area(float a,float b,float c);

};

void Shape::area(int r)

{

  a=float(PI*r*r);

  cout<<"\nArea of Circle is:"<<a;

}

void Shape::area(float s)

{

 a=pow(s,2);

 cout<<"\nArea of Square is:"<<a;

}

void Shape::area(float l,float b)

{

  a=l*b;

  cout<<"\nArea of Rectangle is:"<<a;

}

void Shape::area(float a,float b,float c)

{

  float s;

  s=(a+b+c)/2;

  a=sqrt(s*(s-a)*(s-b)*(s-c));

  cout<<"\nArea of Tringle is:"<<a;

}

void main()

{

  clrscr();

  float k=6.5;

  Shape s;

  s.area(5);

  s.area(k);

  s.area(5,6.5);

  s.area(10,15.5,6.8);

  getch();

}

Output: