C. Return the function pointer.

C. Return the function pointer.

Functions

Char (* retCharWithInt (char, char) (int );

 

Declares the function pointer retCharWithInt, which points to a function with the form parameter (char, char) and the return value is char (*) (int.

If it is defined

Char (* retCharWithInt (char c1, char c2) (int ){;}

 

Defines the function (* retCharWithInt (char c1, char c2 ))

This method has been used in linux and C ++ STL.

The system calls signal to set the processing method of a signal. The call declaration format is as follows:

Void (* signal (int signum, void (* handler) (int );

 

Handler is the function pointer pointing to void (*) (int.

That is, the return value of the parameter (int, void (* handler) (int) is the function pointer signal that points to the parameter (int) and returns the void.

This method returns a pointer to the function in the function.