一、项目需求

添加联系人：向通讯录中添加新人，信息包括（姓名、性别、年龄、联系电话、家庭住址）最多记录1000人
显示联系人：显示通讯录中所有联系人信息
删除联系人：按照姓名进行删除指定联系人
查找联系人：按照姓名查看指定联系人信息
修改联系人：按照姓名重新修改指定联系人
清空联系人：清空通讯录中所有信息
退出通讯录：退出当前使用的通讯录

二、创建项目

#include <iostream>
using namespace std;
#include <string>
#define MAX 1000//Set up a Person struct to lay in the data
struct Person
{string Name;int Sex;int Age;string Phone;string Addr;
};
//Set up a Addressbooks struct to lay in person information
struct Addressbooks
{struct Person personArray[MAX];int Size;
};
//A Function to show the fundamental function
void showMenu()
{cout << "********************************" << endl;cout << "*****   1.Add Member       *****" << endl;cout << "*****   2.Show Member      *****" << endl;cout << "*****   3.Delete Member    *****" << endl;cout << "*****   4.Search Member    *****" << endl;cout << "*****   5.Edit Member      *****" << endl;cout << "*****   6.Clean up Member  *****" << endl;cout << "*****   0.Exit             *****" << endl;cout << "********************************" << endl;cout << "Please choose the number" << endl;
}
void addPerson(Addressbooks* abs)
{//To judge whether the Addressbooks is full , if not , enter the data if (abs->Size == MAX){cout << " The List is full!" << endl;return;}else{string name;cout << "Please set the name:" << endl;cin >> name;abs->personArray[abs->Size].Name = name;}cout << "Please set the sex:" << endl;cout << " *1 --- ♂* " << endl;cout << " *2 --- ♀* " << endl;int sex = 0;//enter 1 or 2 to jump out of the circulation , if not , continue the circulationwhile (true){cin >> sex;if (sex == 1 || sex == 2){abs->personArray[abs->Size].Sex = sex;break;}else{cout << "Error.Please reset the Sex" << endl;}}//enter the data of Personcout << "Please set the Age:" << endl;int age = 0;cin >> age;abs->personArray[abs->Size].Age = age;cout << "Please set the Number:" << endl;string phone;cin >> phone;abs->personArray[abs->Size].Phone = phone;cout << "Please set the Address:" << endl;string address;cin >> address;abs->personArray[abs->Size].Addr = address;abs->Size++;cout << "Success" << endl;system("pause");system("cls");
}
//This function can show all the person data in the addressbook
void showPerson(Addressbooks* abs)
{if (abs->Size == 0){cout << "Empty" << endl;}else{for (int i = 0; i < abs->Size; i++){cout << "Name:" << abs->personArray[i].Name << "\t";cout << "Sex:" << (abs->personArray[i].Sex == 1 ? " ♂ " : " ♀ ") << "\t";cout << "Age:" << abs->personArray[i].Age << "\t";cout << "PhoneNumber:" << abs->personArray[i].Phone << "\t";cout << "Address:" << abs->personArray[i].Addr << endl;}}//Pause and clean the windowsystem("pause");system("cls");}
//This function can examine whether the person is exist
int isExist(Addressbooks* abs, string name)
{for (int i = 0; i < abs->Size; i++){if (abs->personArray[i].Name == name){return i;}}return -1;
}
//This function can delete the person data
void deletePerson(Addressbooks* abs)
{cout << "Please enter a name that you want to delete" << endl;string name;cin >> name;//ret == -1 , does not exist//ret != -1 , exist , deleteint ret = isExist(abs, name);if (ret != -1){//Found the one you want to delete//run the delete fuctionfor (int i = ret; i < abs->Size; i++){//data coverabs->personArray[i] = abs->personArray[i + 1];}//refresh the person data abs->Size--;cout << "Detele Success" << endl;}system("pause");system("cls");
}
//Search the person data you want
void findPerson(Addressbooks* abs)
{cout << "Please enter a person you want to find" << endl;string name;cin >> name;int ret = isExist(abs, name);if (ret != -1){cout << "Name:" << abs->personArray[ret].Name << "\t";cout << "Sex:" << (abs->personArray[ret].Sex == 1 ? " ♂ " : " ♀ ") << "\t";cout << "Age:" << abs->personArray[ret].Age << "\t";cout << "PhoneNumber:" << abs->personArray[ret].Phone << "\t";cout << "Address:" << abs->personArray[ret].Addr << endl;}else{cout << "Error, doesn't find the person" << endl;}system("pause");system("cls");
}
//Edit the person data
void modifyPerson(Addressbooks* abs)
{cout << "Please enter a person you want to modify:" << endl;string name;cin >> name;int ret = isExist(abs, name);if (ret != -1){string name;cout << "Please enter a Person Name" << endl;cin >> name;abs->personArray[ret].Name = name;cout << "Please enter a Person Sex" << endl;cout << "1 --- ♂" << endl;cout << "2 --- ♀" << endl;int sex = 0;while (true){cin >> sex;if (sex == 1 || sex == 2){abs->personArray[ret].Sex = sex;break;}else{cout << "Error , please enter a right number" << endl;}}cout << "Please enter the number" << endl;string phone;cin >> phone;abs->personArray[ret].Phone = phone;cout << "Please enter the address" << endl;string address;cin >> address;abs->personArray[ret].Addr = address;cout << "Edit Success" << endl;}else{cout << "Error , doesn't find the person" << endl;}system("pause");system("cls");
}
// Clear up the Addressbooks
void cleanPerson(Addressbooks* abs)
{abs->Size = 0;cout << "The Addressbooks are Clear up" << endl;system("pause");system("cls");
}
int main()
{Addressbooks abs;abs.Size = 0;int select;//enter a number from 0-6 and do the functionwhile (true){showMenu();cin >> select;switch (select){case 1:addPerson(&abs);break;case 2:showPerson(&abs);break;case 3:deletePerson(&abs);break;case 4:findPerson(&abs);break;case 5:modifyPerson(&abs);break;case 6:cleanPerson(&abs);break;case 0:cout << "Welcome Next Time!" << endl;system("pause");return 0;break;default:cout << "* Please enter a number from 0-6 *" << endl;break;}}system("pause");return 0;
}

三、分析与总结

1、system("pause");

system（）就是调用（DOS）系统命令（和shell命令）。 

pause ，即DOS命令集合中的暂停命令；

在一个程序中写有  system("pause")语句时，就是说从该程序里调用了“pause”命令，即让操作系统来暂停该程序进程的执行，同时程序运行到此语句处时，会在程序的窗口上显示“Press any key to continue . . .” 也就是 “按任意键继续...”，即等待用户按下任意一个按键使该程序从暂停状态返回到执行状态继续从刚才暂停的地方开始执行。
 

参考链接与书籍

《C++从入门到精通（第四版）》（清华大学出版社）

2021C++基础入门之通讯录管理系统(二)_QZP51ZX的博客-CSDN博客C++使用system( “pause “);来暂停黑窗口_haiross的专栏-CSDN博客_c++ pause（C++）基础练习项目——通讯录管理系统_Lemon_CHA的博客-CSDN博客