The difference between pointer arrays and arrays of pointers

1: Array of pointers: the elements inside this array are all pointers ;

Such as:

int a[] = {1,2,3,4,5};

int *p[] = {&a[0],&a[1],&a[2],&a[3],&a[4]};//All elements are addresses

2: Array Pointers:

A pointer to an array is called an array pointer

int (*p) [4]; The array pointer is the row pointer; The P pointer points to an array of 4 values of type int

3: Function pointer:

A pointer to a function

The return type is the return type of the int function; parameter is the parameter type of the function fun

Int (*fun) (int x, int y);

Such as:

/* p is a function pointer */
Assignment value:

Int (* p) (int, int) = & Max; & can omit Max as a function

Use:

P (A, B);//equals Max (b)

4: pointer function:

The pointer function returns an address;

int * Fun (int x)

{

int *p = &x;

return p;

}

5: Use of function pointer arrays

/* Define function pointer array variable Fun_array
(int,int) a list of functions corresponding to the function pointer array that points to 4 function names
*/
Int (*fun_array[4]) (int,int) = {Add, sub, mul, Div};

int result = Fun_array[0] (i,j); A function that represents the No. 0 array element is called the Add function

The difference between pointer arrays and arrays of pointers