What are the scenarios where C language inline functions are used?

There are several scenarios where using an inline function is appropriate:

1. Declaring small and frequently called functions as inline functions can reduce the overhead of function calls and improve the program’s execution efficiency.
2. Defining commonly used simple functions as inline functions can reduce the overhead of function calls and improve program execution efficiency.
3. For functions with a long body that are only called in one place, declaring them as inline functions can avoid the overhead of function calls and improve the program’s execution efficiency.
4. Overload operator functions: When defining overloaded operator functions, it is common practice to declare them as inline functions to improve program efficiency.
5. Function templates: Function templates are often instantiated multiple times in code. Declaring a function template as an inline function can reduce the overhead of function calls and improve program execution efficiency.