Array pointers and arrays of pointers

Array of pointers

int *p[10];

[] High priority, the first combination with P as an array, and then by int* that this is an integer pointer array, which has 10 pointer-type array elements. The execution of p+1 here is wrong, so the assignment is also wrong: P=a, because P is an unknown representation, only p[0], p[1], p[2]...p[n-1], and they are pointer variables that can be used to hold variable addresses. But can be so *p=a; Here *p represents the value of the first element of the pointer array, the value of the first address of a.

To assign a two-dimensional array to a pointer array:
int *p[3];
int a[3][4];
for (i=0;i<3;i++)
P[i]=a[i];
Here int *p[3] indicates that a one-dimensional array holds three pointer variables, respectively p[0], p[1], p[2]
So you have to assign values separately.

Array pointers

int (*p) [10]; The first point is that P is a pointer to a one-dimensional array of integers, and the length of the one-dimensional array is n, or the step of P. In other words, when executing p+1, p crosses the length of n integer data.

To assign a two-dimensional array to a pointer, you should assign this value:
int a[3][4];
int (*p) [4]; The statement defines an array pointer to a one-dimensional array with 4 elements.
P=a; Assign the first address of the two-dimensional array to p, i.e. a[0] or &a[0][0]
p++; After the statement executes, that is, P=p+1;p crosses line a[0][] points to the line a[1][]

So an array pointer is also called a pointer to a one-dimensional array, also known as a row pointer.

Array pointers and arrays of pointers