Through the previous article, we have a basic understanding of pointers , I see. It's just something with an address , But the use of relative pointers , I'll talk again about the basic uses of pointers ;

Pointer operation ：

The pointer can also be ++,-- perhaps +,- Operation of , But the budget of the pointer is limited to this ,++,+ Represents that the pointer moves forward ,--,-
Represents a backward movement of the pointer . It also refers to the forward or backward address it refers to ;

Like the next program ：
int a[10]; int *p; p = &a; //p point a array i = 0; for(i;i<10;i++) {
printf("%p",p);// Output now p Position indicated P ++; //p Add one to the indicated position }
This program outputs a Address of items in the array ;

When the address of an array is given to a pointer , When this pointer refers to
a【0】 Address of , That is, the address of the first number in the array , Because of the array arrangement , The given location space in memory is continuous , So when we add one to the value indicated by the pointer , That means pointing to the next address in the array ;

Relational operation of pointer ：

Relationship between two pointers , Size, etc , The comparison refers to the relationship between the addresses , And the size of the address , By ASC|| Code ; It's like ：

int a,*p,*d;

*p = &a;

When in this case

We say    *p == *d; This would be a fake ;

*d = &a;

*p == *d;

under these circumstances , This will be true , Only when two pointers point to one address at the same time , Then the two pointers can be said to be equal .

Relationship between pointer and array ：

Next, let's focus on the relationship between pointers and arrays , How do they use each other ;

As we mentioned above , When the pointer points to a one-dimensional array , The address it refers to is the address of the first value of the array , When the pointer is performing an operation +, - Hour , Corresponding , The address it refers to will also change ;

When the pointer points to a multidimensional array , In fact, it is similar to pointing to a one-dimensional array , The changes were like this

a【2】【2】; In this array , We let *p=&a;

initial p Is pointing a【0】【0】;

When p++ Hour , Will point to a【0】【1】; Next is a【0】【2】;a【1】【0】;a【1】【1】; and so on ;

Address description meaning the description meaning of array elements
a,*a,a【0】,&a【0】【0】,pa First address of **a,*p,*a【0】,          a【0】【0】a【0】【0】 Value of
*{a【0】+1）,               *（&a【0】【0】+1a【0】【1】 Value of
**(a+1),*a【1】,a【1】【0】
a【1】【0】 Value of
a+ia【i】【0】 Address of **（a+i）,*a【i】,              a【i】【0】a【i】【0】 Value of