Operator Overloading In C++| Example Of Operator Overloading In C++| Operator Overloading In C++ In Hindi

 

Operator Overloading In C++

Operators to work for user defined classes. This means C++ has the ability to provide the operators with a special meaning for a data type, this ability is known as operator overloading.

Fig:Operator Overloading In C++

Rules of operator overloading

·       In case of a non-static function, the binary operator should have only one argument and unary should not have an argument.

 

·       In the case of a friend function, the binary operator should have only two argument and unary should have only one argument.

 

·       All the class member object should be public if operator overloading is implemented.

 

·       Operators that cannot be overloaded are . .* :: ?:

 

·       Operator cannot be used to overload when declaring that function as friend function = () [] ->.

 

Synatx:

class baseclass

{

//body of base

return type operator++(argument)

{

 

}

return type operator operator name(argument)

{

 

}

};

Program:

#include<iostream.h>

#include<conio.h>

class base

{

Int n;

public:

base()

{

n=0;

}

void operator++()

{

n=n-2;

}

Void operator—()

{

n=n+2;

}

void show()

{

cout<<”n=”<<n;

}

};

void main()

{

base obj;

obj.show();

++obj;

obj.show();

++obj;

obj.show();

--obj;

obj.show();

--obj;

obj.show();

getch();

}

Output:

n=0

n=-2

n=-4

n=-2

n=0