1.访问指针

#include <iostream>
#include <windows.h>
#include <string>
using namespace std;
int main() {
    int room = 2;
    int room1 = 3;

    int* p1 = &room;
    int* p2 = p1;

    int* p3 = p1;
    printf("room的地址：%d\n", &room);
    printf("p1的值：%d p2的值：%d\n", p1, p2);
    printf("p3的值：%d\n", p3);

    p3 = &room1;
    printf("p3的值：%d,room1的地址：%d\n",p3,&room1);//不建议用这种方式

    //使用16进制打印，把地址值当成一个无符号数来处理
    printf("p1=0x%p\n",p1);
    printf("p1=0x%x\n", p1);
    printf("p1=0x%X\n", p1);

    system("pause");
    return 0;
}

2.访问指针的内容

#include <iostream>
#include <windows.h>
#include <string>
using namespace std;
int main() {
    int room = 2;
    int* girl = &room;

    int x = 0;
    x = *girl; //*是一个特殊的运算符，* girl 表示读取指针 girl 所指向
              //的变量的值, *girl 相当于 room
    printf("x:%d\n",x);

    *girl = 4;//相当于room = 4；
    printf("room:%d,*girl:%d\n",room,*girl);

    system("pause");
    return 0;
}