What is operator overloading in C++ with example?

In C++, we can change the way operators work for user-defined types like objects and structures . This is known as operator overloading. For example, Suppose we have created three objects c1 , c2 and result from a class named Complex that represents complex numbers.

It is polymorphism in which an operator is overloaded to give user defined meaning to it . Overloaded operator is used to perform operation on user-defined data type. For example ‘+’ operator can be overloaded to perform addition on various data types, like for Integer, String(concatenation) etc.

Operator Overloading is the method by which we can change the function of some specific operators to do some different task . In the above syntax Return_Type is value type to be returned to another object, operator op is the function where the operator is a keyword and op is the operator to be overloaded.

The postfix increment operator ++ can be overloaded for a class type by declaring a nonmember function operator operator++() with two arguments, the first having class type and the second having type int . Alternatively, you can declare a member function operator operator++() with one argument having type int .