"C and pointer" - Chapter 13 advanced pointer int * (* (* (*f) () [6]) ()

Be careful ： This is an original article , Without consent , Please do not reprint at will .

1. The inference process from declaration of high-level pointer to description

 Take the following pointers as an example ：
int *(*(*(*f)())[6])();

1.1 Other small examples

Serial number	Statement	describe
1	int f();	f Is a function , Return integer
2	int f[3];	f It contains 3 Array of elements , Element type is integer
3	int **f();	f Is a function , The return type is a pointer to an integer pointer
4	int (*f)();	f It's a pointer , Pointing function , Return integer ,
5	int (*f)[6];	f It's a pointer , Pointing to the array , Array has 3 Elements , The element type is integer ;
6	int *f();	f Is a function , Returns an integer pointer
7	int **(*f[6])();	f Is an array , Element type is pointer , Pointing function ; That is, the array element type is function pointer ; The return value is a pointer to an integer pointer
8	int **f[6];	f Is an array , The element type is a pointer to an integer pointer
9	int *(*f)[6];	f It's a pointer , Pointing to the array , namely f Is an array pointer ; Returns a pointer to an integer
10	int *(*f())();	f Is a function , Return pointer , Pointer to function , That is, the return value type is function pointer ; The return value of the function is a pointer to an integer
11	int (**(*f)())();	f It's a pointer , Pointing function , namely f It's a function pointer ; The function returns a pointer p1, The pointer p1 Point to another pointer p2, Another pointer p2 Pointing function , namely p2 It's a function pointer , This function pointer returns an integer ; namely f It's a function pointer ,f The function pointed to returns a pointer to the function pointer , The return value of the last returned function is an integer
12	int (*(*f)())[6];	f It's a pointer , Pointing function , namely f It's a function pointer ; This function returns a pointer , The pointer points to int Type of the array ; namely f It's a function pointer , Returns a pointer to an integer array
13	int *(*(*(*f)())[6])();	f It's a pointer , The pointer points to a function , Function returns an array pointer , Array elements are Pointers , Point to a function , That is, the array element is a function pointer , The return value of the function is an integer pointer .

2. The writing idea of high-level pointer from description to declaration

 Take the description of the following statement as an example ：
 The return value is 【 Point to  "  The return value is int Function pointer of type pointer  "  The pointer to the array of  】 Function pointer of 

2.1 Other small examples

Serial number	describe	Statement
1	int Type pointer	int *f;
2	int Type pointer	int** f;
3	int Type of the array	int f[6];
4	Point to 【int Type of the array 】 The pointer to	int (*f)[6];
5	int Type pointer array	int* f[6];
6	Point to 【int Type pointer array 】 The pointer to	int* (*f)[6];
7	int Pointer array of type pointer	int* *f[6];
8	The return value is int Function of	int f();
9	The return value is 【int Type pointer 】 Function of	int* f();
10	The return value is 【int Type pointer 】 Function of	int** f();
11	The return value is int Function pointer of	int (*f)();
12	The return value is int Function pointer of type pointer	int* (*f)();
13	The return value is int Function pointer of pointer of type	int** (*f)();
14	The return value is int Array of function pointers	int (*f[6])();
15	Point to 【 The return value is int Function of type pointer 】 An array of pointers for	int* (*f[6])();
16	Point to 【 The return value is int Function of type pointer 】 An array of pointers for	int** (*f[6])();
17	The return value is 【 The return value is int Function pointer of 】 Function of	int (*f())();
18	The return value is 【 The return value is int Pointer to function of 】 Function of	int (**f())();
19	The return value is 【 The return value is int Function pointer of type pointer 】 Function of	int* (*f())();
20	The return value is 【 The return value is int Function pointer of 】 Function pointer of	int (*(*f)())();
21	The return value is 【 The return value is int Pointer to the function of 】 Function pointer of	int (**(*f)())();
22	The return value is 【 The return value is int Function pointer of type pointer 】 Function pointer of	int *(*(*f)())();
23	The return value is 【 Point to int Pointer to type array 】 Function pointer of	int (*(*f)())[6];
24	The return value is 【 Point to int Pointer of type pointer array 】 Function pointer of	int *(*(*f)())[6];
25	The return value is 【 Point to " The return value is int Function pointer of type pointer " The pointer to the array of 】 Function pointer of	int* (*(*(*f)())[6])();

3. The literature

The subject comes from 《C And a pointer 》