How to define and use pointers in C++

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1 the basic concept of pointer

Function: memory can be accessed indirectly through pointers.

Memory numbers are recorded from 0 and are usually represented by hexadecimal numbers. You can use pointer variables to save addresses.

2 definition and use of pointer variables

Pointer variable definition syntax:

Data type * variable name; & you can take the address; * you can take the value stored by the address

Example:

# includeusing namespace std;int main () {int a = 10; / / 1. Syntax for pointer definition: data type * pointer variable name; int* p; / / int* defines a pointer variable p = & a; cout pointing to an integer type