Write a C++ program to calculate the area of circle, rectangle and triangle using function overloading.

Program Algorithm:
Step 1: Include the header files
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 exit


Program Code in C++:
#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)
{
}
getch();
}
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();
}


Program Output:
Function Overloading
1. Area of Circle
2. Area of Rectangle
3. Area of Triangle
4. Exit
Enter Your Choice: 2
Enter the Sides of the Rectangle: 5 5
Area of Rectangle is: 25
1. Area of Circle
2. Area of Rectangle
3. Area of Triangle
4. Exit
Enter Your Choice: 4
Mukesh Rajput

Mukesh Rajput

I am a Computer Engineer, a small amount of the programming tips as it’s my hobby, I love to travel and meet people so little about travel, a fashion lover and love to eat food, I am investing a good time to keep the body fit so little about fitness also..

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