How to Use Operator Overloading in C++

Operator overloading is handy in C++ when object-oriented programming is used. It's used in C++ classes whenever you need to define special functionality to existing C++ primitive operators. For example, the "+" operator is used to add integers in C++. The expression "2+2" will return the integer 4.

Instructions

1. Determine which operators are required to be overloaded in your C++ class. Remember in C++, the user can overload the behavior of any operator. The most common overloaded operators are: ">>", "+", and "-".

2. Define the operator you plan to overload in your class definition. The C++ syntax is the following: operator ( parameter... );

3. Write your overloaded class member function. This could be a bit tricky depending on what you're trying to do. Be certain that your member function provides the functionality that your class requires.

4. Test your new operator function. At the bare minimum, create a new object and invoke the new overloaded operator. It's always a good idea to test your new functions thoroughly. Better testing results in better products.

5. Integrate your class into your C++ software baseline. If several developers are working on the project, provide adequate documentation on your new overloaded operator. Also, provide an example to clarify the behavior.

Tips & Warnings

• In C++, if you try to add two television objects that you defined in your television class, the behavior is determined by how your "+" operator is overloaded in the television class implementation.