"C Language and program design" two-dimensional arrays, array pointers, and pointer arrays

A two-dimensional array can be seen as a one-dimensional array of elements in a one-dimensional array, so the storage of two-dimensional arrays and the manipulation of pointers are easy to confuse:

Suppose there are one or two-dimensional arrays

A[3][4] = {{4,5,6}, {7,8,9}}

a--two-dimensional array name, which is essentially a pointer to the first element of the element's one-dimensional array with {4,5,6}, {7,8,9}, {a[0}, and its value is the address (the line address) of the elements.

a[0]--a one-dimensional array name, in essence, the first element pointer of a one-dimensional array of elements with a value of a[0][0] (the address of the column)

a[0][0]--elements of a two-dimensional array a[3][3] and a one-dimensional array (sub-array) a[0]

Can be seen

A+i=&a[i] Row address equal corresponding pointer to an array pointer such as (*P) [4]

a[i]=* (a+i) =&a[i][0] column address equal to the pointer is a normal pointer *p

But a is not a pointer array

"C Language and program design" two-dimensional arrays, array pointers, and pointer arrays