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_33

33. Assignment and Initialization

Ray Lischner¹ 

(1)

Ellicott City, MD, USA

 

The final step needed to complete this stage of the rational type is to write assignment operators and to improve the constructors. It turns out C++ does some work for you, but you often want to fine-tune that work. Let’s find out how.

Assignment Operator

Until now, all the rational operators have been free functions. The assignment operator is different. The C++ standard requires that it be a member function. One way to write this function is shown in Listing 33-1.

struct rational

{

  rational(int num, int den)

  : numerator{num}, denominator{den}

  {

    reduce();

  }

  rational& operator=(rational ...