ALGORITHM:

STEP 1: Start the program.
STEP 2: Declare the class name as fn with data members and member functions.
STEP 3: Read the choice from the user.
STEP 4: Choice=1 then go to the step 5.
STEP 5: The function area() to find area of circle with one integer argument.
STEP 6: Choice=2 then go to the step 7.
STEP 7: The function area() to find area of rectangle with two integer argument.
STEP 8: Choice=3 then go to the step 9.
STEP 9: The function area() to find area of triangle with three arguments, two as Integer and one as float.
STEP 10: Choice=4 then stop the program.
PROGRAM:

#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 Radious 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(); }