C language arrays, pointer arrays, array pointers, two-dimensional array pointers

1. Arrays and pointers

int array[5] = {1,2,3,4,5}; // Defining Arrays

   1. Pointer and array relationships
int * pa = array;
　　pa = array;     // p[0] = =  * (p+0) = = Array[0] = = * (array+0)    printf ("%p\n", PA);    printf ("%p\n", array);     /*         Access An array of two ways        1. The subscript method accesses the array name [subscript] pointer [subscript] subscript: Offset        2. Pointer method Access * (p+1)    */

2. Array of pointers

 int  array[5 ] = {1 , 2 , 3 , 4 , 5 }; //     defines an array  int  (*p) [5 ] = &array; //     Defines an array pointer  int  *arr[5 ]; //  pointer array, so the element in the array retains the position of the int pointer 
 
  

    *p = p[0];    (*p) [1]  = = array[1];    p[0] [1]  = = (*p) [1] = = array[1];

3. Two-D array pointers

    //pointers to 32-D arrays    intarray2[2][3] = {{1,2,3},{4,5,6}}; int(*P2) [2][3]  =NULL; P2 = &array2;//assigns the array pointer to the array*p = =array2; (*P) [0][0] = = p[0][0][0]; //    /**    //p + 1 crosses 6 * 4 bytes//P[0] + 1 crosses 3 * 4 bytes//P[0][0] + 1 crosses 4 bytes//P[0][0][0] + 12-d array first element value +1//    */

4. Array of pointers

The elements in the array are pointers (addresses)

    int *arr[5]; // array of pointers, so the elements in the array retain the position        of the int pointer int 1 ;        arr[1] = &a;

5. Pointer to pointers

    // 4. Two-D pointer    int A;     int *p = &A;     int **pp = Pointer to &p;//pointer

C language arrays, pointer arrays, array pointers, two-dimensional array pointers