当前位置:网站首页>Define in and define out
Define in and define out
2022-07-05 07:51:00 【Yang_ Winston】
Recently, when looking at the code , I found that there are many variables or functions in front of IN or OUT“ modification ”, This is not a type , Find the definition , Discovery is defined like this :#define IN
At first glance, I don't know what I mean , Different from common macro definitions , Its second value is empty . There is a saying that may explain , Record here .
This is a programming specification
such as #define IN
#define OUT
Define a function int fun(IN char *param,OUT *char result)
Indicates that the first parameter is the incoming parameter , The second parameter is the callback result , because IN OUT Itself is empty , So it doesn't affect the compilation , Just for code specification , Let people more clearly define .
边栏推荐
- Process (P) runs, and idle is different from pycharm
- Global and Chinese market for blood typing 2022-2028: Research Report on technology, participants, trends, market size and share
- Use stm32cubemx tool to write the demo program of FreeRTOS
- Embedded AI intelligent technology liquid particle counter
- Scm-05 basis of independent keyboard
- Global and Chinese market of resistivity meter 2022-2028: Research Report on technology, participants, trends, market size and share
- Global and Chinese market of core pallets 2022-2028: Research Report on technology, participants, trends, market size and share
- Let me teach you how to develop a graphic editor
- Significance and requirements of semiconductor particle control
- The browser cannot access Baidu
猜你喜欢
Markdown tips
MySql——存储引擎
Win10 shortcut key
Train your dataset with yolov4
Altium Designer 19.1.18 - 更改铺铜的透明度
Altium designer 19.1.18 - Import frame
The folder directly enters CMD mode, with the same folder location
SQL JOINS
Realization of binary relation of discrete mathematics with C language and its properties
Latex notes
随机推荐
PIL's image tool image reduction and splicing.
[MySQL] database knowledge record
Package ‘*****‘ has no installation candidate
Realization of binary relation of discrete mathematics with C language and its properties
[professional literacy] specific direction of analog integrated circuits
通过sql语句统计特定字段出现次数并排序
Cygwin installation
Detour of Tkinter picture scaling
1089 Insert or Merge 含测试点5
Apple input method optimization
Count and sort the occurrence times of specific fields through SQL statements
Random function usage notes
Threads and processes
Can't find real-time chat software? Recommend to you what e-commerce enterprises are using!
A series of problems in offline installation of automated test environment (ride)
About the problem that MySQL connector net cannot be cleared in MySQL
Good websites need to be read carefully
MySQL - storage engine
Deepin get file (folder) list
Global and Chinese markets for flexible endoscopic lithotripsy devices 2022-2028: Research Report on technology, participants, trends, market size and share