Review of the written examination of the school recruit--pointer array and array pointer

First, look at a set of definitions

1. An integer number int A;

2. A pointer to an integer number int *a;

3. A pointer to a pointer pointing to a pointer to an integer number int **a;

4. An array of 5 integers int a[5];

5. An array with 5 pointers pointing to an integer int *a[5];

6. A pointer to an array of 5 integer numbers int (*a) [5];

7. A pointer to a function that has an integer parameter and returns an integer number int (*a) (int);

8. An array of 5 pointers to a function that has an integer parameter and returns an integer number int (*a[5]) (int);

Overall:

Pointer array: An array of pointers, representing an array, and each element of the array is a pointer type.

Array pointer: A pointer to an array that represents a pointer and a pointer to an array.

Second, several pen questions

1.int **a[3][4], how much space this array occupies

Parse: This is a two-bit 3*4 size array of pointers

Each pointer occupies 4 bytes, and the array has a total of 3*4 elements

Result: 4*3*4=48 bytes

2.

To be Continued ...

　　

Review of the written examination of the school recruit--pointer array and array pointer