Pointer array and array pointer

When an array is passed into a function, it degrades to a pointer. A one-dimensional array is directly degraded into a pointer, and a two-dimensional array is degraded into a pointer pointing to a one-dimensional array, such as char (*) [32] (optional): char a [] []; func (char B [], int rows, int cols); func (char (* B) []); pointer array: array of pointers, which is an array used to store pointers, that is, the array elements are pointer array pointers: a pointer to an array, that is, the pointer to the array int (* p) [10]; defines an array pointer, this pointer is no different from a general pointer. It only points to an array. Here we take the array as the basic element for processing. That is to say, the entire array is taken as a type, and the array name is a specific variable of this type. For example: int a [10]; an array type in the shape of int [10]; a is a newly defined variable. For the array type: int [10], we can define a pointer, int (* p) [10]. Note that a small Arc must be added here. Otherwise it will become a pointer array. After a pointer is defined, we can assign a value to the pointer, for example, p = & a; if a two-dimensional array is defined, int c [3] [10]. We can think that a one-dimensional array is defined. This array has three int [10] elements. Therefore, like an ordinary array, we can assign the array name to the pointer, which is actually the address of the first element to the pointer. That is, p = c; or p = & c [0]. And so on.