The differences between C language (c + +) macros, inline functions, functions, and usage scenarios summary

(1) Parameter passing: macros can be easily inherited before the code variables, functions, inline functions are dependent on the parameters and global variables

(2) code generation macros and inline function generation are replaced when there is no stack at the time of the function call, so the execution efficiency will be higher than the function, without the risk of stack overflow, but will generate more code to occupy more space.

(3) Function and inline function to change the input parameters must be referenced or pointer

Macros

#define STR (str) #str means to add str ""

#define STR (str) x# #str means to connect str to X

An already special symbol cannot be used as a macro parameter.

The differences between C language (c + +) macros, inline functions, functions, and usage scenarios summary