Array pointer pointer array

Array pointers (also called row pointers)
define INT (*p) [n];
() high priority, the first explanation is that p is a pointer to an integer one-dimensional array, the length of the one-dimensional array is n, it can be said that 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 of pointers
define int *p[n];
[] High priority, the first combination with P as an array, and then by int* that this is an integer pointer array, it has n pointer type array elements. When P+1 is executed, p points to the next array element, so that the assignment is 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];
p++; The statement indicates that the P array points to the next array element. Note: Each element of this array is a pointer
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 pointer pointer array