1, pointer pointer, two-level pointer int a = 1;*AA = &A;**AAA = &aaaaa value: **AAAAAA Address: *aaa 2, void (*b[10]) (void (*) ()), B is an array, the array has 10 element, each element is a pointer to a function, the function argument is "void (*) ()" "Note 1", and the return value is "void"! Note 1: This parameter is also a pointer to a function, the function parameter is empty, the return value is "void". int* (*a[5]) (int, char*), first see the identifier name a, "[]" priority is greater than "*", A and "[5]" first combined. So a is an array, the array has 5 elements, each element is a pointer, pointer to "(int, char*)", pair, point to a function, the function argument is "int, char*", the return value is "int*". Cast to a function pointer, this function returns a value of void, the argument is void *, like void (*fun) (void *) void in Chinese translated to "untyped". It is commonly used in programming to declare the parameter types, return values, and pointer types in functions that define functions. void literal means "no type", void * is "untyped pointer", void * can point to any type of data. (Void (*) (void *)) cast to a function pointer, the function return value is void, the argument is void *, like void (*fun) (void *)
C Language Pointers
