Exploring C++20: The Programmer's Introduction to C++

© Ray Lischner 2020

R. LischnerExploring C++20https://doi.org/10.1007/978-1-4842-5961-0_31

31. Overloading Operators

Ray Lischner¹ 

(1)

Ellicott City, MD, USA

 

This Exploration continues the study of writing custom types. An important aspect of making a custom type behave seamlessly with built-in types is ensuring that the custom types support all the expected operators—arithmetic types must support arithmetic operators, readable and writable types must support I/O operators, and so on. Fortunately, C++ lets you overload operators in much the same manner as overloading functions.

Comparing Rational Numbers

In the previous Exploration, you began to write a rational type. After making a modification to it, an important step is testing the modified type, ...