Operator Overloading

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Operator Overloading

     Just like the functions are being overloaded, the operator can also be overloaded in C++. Operator overloading means, given additional meanings to the operators like +,*,<=,+= when dealing with objects of user-define-class or in other words, the operators perform more than their conventional role.

Assignment operator	Arithmetic operator	Relational operator	Logical operator	Bitwise operator	Increment & Decrement operator	Special operator
=	+ - * / % += -= *= /= %=	< <= > >= == !=	! && ||	& | ~ ^ << >> <<= >>= &= = ^+	++ --	, [] () -> ->* new new[] delete[] delete[]

Overloadable Operator

The simple example of Operator overloading is given below :

/*Operator Overloading + */ #include<iostream> #include<conio.h> using namespace std; class OpeOverloading { int a; public: OpeOverloading() { a = 1; } void show() { cout<<"Operator Overloading\n"; cout<< a<< endl; } void operator+() { a = +a; } }; int main() { OpeOverloading obj; +obj; +obj; obj.show(); getch(); }


another example :


/*Write a C++ program using Operator Overloading to find the factorical for a given number */ #include<iostream.h> #include<conio.h> int i = 1; class OpeOverloading2 { public: void operator() { ++;; } }; void main() { OpeOverloading2 obj; int n,sum = 1; clrscr(); cout<< "Enter the No."; cin>>n; for(;i< n; ) { sum = sum * i; obj ++; } cout<< "Factorical="<< sum; getch(); }

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