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Question -

What is function overloading ? Write an example using C++ to illustrate the concept of function overloading.



Answer -

Function Overloading
In C++, we can declare different functions with same name. This property is called function overloading. Function overloading implements polymorphism.
Example:
# include
#include < stdlib.h>
#include < conio.h>
#define pi 3.14

class fn    [1]
{
public:
void area(int); //circle 
void area(int,int); //rectangle
};
void fn : : area(int a)
{
cout <<"Area of Circle:"<
}
void fn::area (int a, int b)
{
cout <<"Area of rectangle:"<
}
void main ( )
{
int ch; 
int a, b, r; 
fn obj;
cout<<''\nl.Area    of Circle\
n2.Area of Rectangle\ n3.Exit\n:"; 
cout<<''Enter your Choice:"; 
cin>>ch; 
switch(ch)
{
case 1: 
cin>>r; 
obj.area(r);
break;    [1]
case 2:
'cin>>a>>b;
obj.area(a,b); 
break; 
case 3:
exit (0);
}
getch ( );
}

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