Write a C++ Program illustrating Function Overloading.

#include<iostream.h>

#include<stdlib.h>

#include<conio.h>

#define pi 3.14

class fn

{

public:

void area(int); //circle

void area(int,int); //rectangle

void area(float ,int,int); //triangle

};

void fn::area(int a)

{

cout<<"Area of Circle:"<<pi*a*a;

}

void fn::area(int a,int b)

{

cout<<"Area of rectangle:"<<a*b;

}

void fn::area(float t,int a,int b)

{

cout<<"Area of triangle:"<<t*a*b;

}

void main()

{

int ch;

int a,b,r;

clrscr();

fn obj;

cout<<"\n\t\tFunction Overloading";

cout<<"\n1.Area of Circle\n2.Area of Rectangle\n3.Area of Triangle\n4.Exit\n:”;

cout<<”Enter your Choice:";

cin>>ch;

switch(ch)

{

case 1:

cout<<"Enter Radius of the Circle:";

cin>>r;

obj.area(r);

break;

case 2:

cout<<"Enter Sides of the Rectangle:";

cin>>a>>b;

obj.area(a,b);

break;

case 3:

cout<<"Enter Sides of the Triangle:";

cin>>a>>b;

obj.area(0.5,a,b);

break;

case 4:

exit(0);

}

getch();

}