Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about the introduction of C++ type conversion in those ways. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

It is well known that C++ introduces four ways about type conversion:

Static_cast

Const_cast

Dynamic_cast

Reinterpret_cast

Why are these types of conversions introduced, and what is the difference between them and the mandatory conversions in C?

In what scenarios are these four types of conversions applied?

Why does C++ introduce these forced conversions?

We all know that C++ is fully compatible with C language, and the conversion method of C language is very simple and can be converted between any types, but this is precisely a disadvantage, because it is extremely insecure and may inadvertently convert a pointer to a const object to a pointer to a non-const object, or a pointer to a derived class object. This conversion is easy to get out of bug, which requires strict code review to eliminate this hidden danger. But the conversion of C is not good for us to review the code, and there may be bug when the program is running.

These types of conversions introduced by C++ can perfectly solve the above problems. Different requirements in different scenarios use different types of conversions, and at the same time, it is conducive to code review.

The following is a detailed description of the usage scenarios for these four types of conversions:

Static_cast

Mode of use:

# include using namespace std; struct Base {virtual void Func () {cout

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