Operator overloading allows operators to be redefined and used where one or both of the operands are of a user-defined class. When it’s done correctly, this can simplify the code and make user-defined types as easy to use as the primitive types.
In the following example, there is a class called MyNum with an integer field and a constructor for setting that field. The class also has a method that adds two MyNum objects and returns the result as a new object.
class MyNum
{
int val;
public:
MyNum(int i) : val(i) {}
MyNum add(const MyNum &a) const {
return MyNum( val + a.val );
}
}; ...
