Simple Program for Function Overloading Using C++ Programming

To calculate the area of  circle, rectangle and  triangle using function overloading.

Simple Program for Function Overloading Algorithm/Steps:

  • 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.

Simple Program for 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 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();
}

Sample 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