How to use callback function in C language

This article mainly introduces the relevant knowledge of how to use the callback function in c language, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value. I believe you will gain something after reading this article on how to use the callback function in c language. let's take a look.

1. Declare a function pointer using typedef.

2. Use C language to implement an and function pointer return value type.

A function whose arguments are all the same (the name of the function is arbitrary).

3. Pass the implemented C language function as a parameter (in fact, the passed function pointer).

4. Call the callback function when the specific situation is satisfied.

Example

/ / callback function typedef int (* callBackFunc) () with no arguments; / / callback function with arguments, which can be one or more typedef int (* callBackFunc) (int x); typedef int (* callBackFunc) (int x, int y, int z) What is C language? C language is a process-oriented and abstract general programming language, which is widely used in low-level development. C language can be used to compile and process low-level memory in a simple way.

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