C Language Pointers

1. int * p;　　Represents the address of a variable of type int with p as the variable name;

such as: int i = 3;　　p = &i; &i represents the address of I

A. P holds the address of I

B. P is not i,i nor p, modifying the value of P does not affect I, and modifying the value of I does not affect p

C. If a pointer variable points to a normal variable, the * pointer variable is equal to the normal variable

2. The pointer is the address, the pointer variable is the variable that holds the address, equivalent to the pointer container

3. The role of the pointer:

To represent some complex data structures

Fast data transfer

Make the function return more than one value

Direct access to Hardware

The ability to handle strings conveniently

is to understand the basics in object-oriented languages

4. The pointer is the address; the pointer cannot be multiplication and can only be reduced

　

C Language Pointers