Shulou(Shulou.com)05/31 Report--

This article introduces the knowledge of "what is the role of the const keyword in C++". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Const modifies common types of variables

Constinta=7

Intb=a;// is correct

Error / error, cannot be changed

An is defined as a constant, and a can be assigned to b, but not again. It is illegal to assign a constant because an is considered by the compiler to be a constant and its value is not allowed to be modified.

Let's take a look at the following:

Case study

# include

Usingnamespacestd

Intmain (void)

{

Constinta=7

Int*p= (int*) & a

* pamph8

Cout

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.