C++ 14 Quick Syntax Reference, Second Edition

CHAPTER 20

Operator Overloading

Operator overloading allows operators to be redefined and used where one or both of the operands are of a user-defined class. When done correctly, this can simplify the code and make user-defined types as easy to use as the primitive types.

Operator Overloading Example

In the example below there is a class called MyNum with an integer field and a constructor for setting that field. The class also has an addition method that adds two MyNum objects together and returns the result as a new object.

class MyNum{ public:  int val;  MyNum(int i) : val(i) {}  MyNum add(MyNum &a)  { return MyNum( val + a.val ); }}

Two ...