1.声明指针

2.初始化指针

3.指针地址和大小，值

4.指针解引用,修改值

5.指针指向堆内存，修改值

6.申请堆内存并释放

7.数组释放

8.指针运算

9.指针递增

10.指针递减

11.指针常量

12.常量指针

13.常量指针指向常量

#include <iostream>
#include <string>using namespace std;/*
* 1.声明指针
* 2.初始化指针
* 3.指针地址和大小，值
* 4.指针解引用,修改值
* 5.指针指向堆内存，修改值
* 6.申请堆内存并释放
* 7.数组释放
* 8.指针运算
* 9.指针递增
* 10.指针递减
* 11.指针常量*12.常量指针* 13.常量指针指向常量
* */int main(){int * i;string * s;int age = 10;int * p = &age;int * dogName = nullptr;cout << "指针的地址："<< &p << endl;cout << "指针的值："<< p << endl;cout << "age得地址："<< &age << endl;cout << "指针的大小："<< sizeof(p) << endl;cout << "age的值："<< age << endl;string name = "小明";string *n = &name;cout << "指针解引用："<< *n << endl;*n = "小红";cout << name << *n << endl;int * score = new int(10);*score = 100;cout << "score="<<*score << endl;int * p2 = new int;p2 = nullptr;delete p2;int *arr = {nullptr};arr = new int[3];delete[] arr;int id[] = {1,2,3};int *pd = id;cout << "pd得值" << pd << endl;cout << "id得地址："<< id << endl;int score2[] = {10,20,30};int *pscore = score2;cout << *pscore << "==" << score2[0] << endl;cout << *(pscore+1) << "==" << score2[1] << endl;for (int j = 0; j < 3; ++j) {cout << *pscore <<endl;pscore++;}int score3 = 59;const int * p3 = &score3;// 只能修改指针的指向，不能修改值
//    p3 = 100;int age3 = 18;p3 = &age3;cout << *p3 << endl;int * const p4 = &score3;
//    p4 = &age3;*p4 = 69;cout << *p4 << endl;const int * const p5 = &score3;
//    p5 = &age3;
//    *p5 = 102;cout << p5 << endl;return 0;
}