//
// main.cpp
// Pointer2
//
// Created by 炒饭 on 2019/4/14.
// Copyright © 2019 炒饭. All rights reserved.
//
#include <iostream>
int main()
{
// insert code here...
using namespace std;
double wages[3] = {10000.0,20000.0,30000.0};
short stacks[3] = {3,2,1};
double *pw = wages;
short *ps = &stacks[0];
cout << " pw = "<< pw <<" , *pw " << *pw <<endl;
cout << "ps = "<< ps << ", *ps "<< *ps <<endl;
ps = ps+1;
cout << "add 1 to the ps pointer:\n";
cout << "ps = "<< ps <<", *ps = "<< *ps <<"\n\n";
cout << "access two elements with array notation\n";
cout <<"stack[0] = "<< stacks[0] <<", stack[1] = "<< stacks[1] <<endl;
cout <<"access two elements with pointer notation \n";
cout << "*stacks = "<< *stacks << ", *(stacks +1) = "<< *(stacks +1)<< endl;
cout << sizeof(wages) <<" = size of wages array\n";
cout << sizeof(pw) << " = size of pw pointer\n";
//显示地址
cout << wages <<endl;//display &wages[]0 8字节的内存块
cout << &wages <<endl;//display adress of whole array 24字节的内存块
//动态结构体声明
struct inflatable
{
char name[20];
float volume;
double price;
};
inflatable * ps1 = new inflatable;
cout << "enter name of inflatavle item: ";
cin.get(ps1->name,20);
cout <<"Enter volume in cubic feet: ";
cin >> (*ps1).volume;
cout << "enter price :$";
cin >>ps1->price;
cout << "name: "<< (*ps1).name << endl;
cout << "volume "<<ps1->volume <<endl;
cout <<"price: $"<<ps1->price << endl;
delete ps1;
std::cout << "Hello, World!\n";
return 0;
}
实验结果：
pw = 0x7ffeefbff550 , *pw 10000
ps = 0x7ffeefbff45c, *ps 3
add 1 to the ps pointer:
ps = 0x7ffeefbff45e, *ps = 2
access two elements with array notation
stack[0] = 3, stack[1] = 2
access two elements with pointer notation
*stacks = 3, *(stacks +1) = 2
24 = size of wages array
8 = size of pw pointer
0x7ffeefbff550
0x7ffeefbff550
enter name of inflatavle item: "zhoujian"
Enter volume in cubic feet: 50
enter price :$10.2
name: "zhoujian
volume 50
price: $10.2
Hello, World!
Program ended with exit code: 0