C++ small project - address book management system

1. Project Introduction

        Realize a simple address book management system, which mainly includes the following functions: add contacts, display contacts, delete contacts, find contacts, modify contacts, clear contacts, and exit contacts.

Two, implement the code

#include <iostream>

using namespace std;
#include <string>

#define MAX 1000 //最大存储联系人数量

//通讯录信息结构体
struct person
{
    string name;//姓名
    int sex;//性别
    int age;//年龄
    string phone;//电话
    string addr;//住址
};

//通讯录结构体
struct addressbooks
{
    struct person personarray[MAX];//通讯录数组
    int size;//通讯录人数
};

//菜单
void showmenu()
{
    cout <<"***********************"<<endl;
    cout <<"*****1、添加联系人*****"<<endl;
    cout <<"*****2、显示联系人*****"<<endl;
    cout <<"*****3、删除联系人*****"<<endl;
    cout <<"*****4、查找联系人*****"<<endl;
    cout <<"*****5、修改联系人*****"<<endl;
    cout <<"*****6、清空联系人*****"<<endl;
    cout <<"*****0、退出通讯录*****"<<endl;
    cout <<"***********************"<<endl;
}

//添加联系人
void addrperson(struct addressbooks * abs)
{
    if(abs->size > 1000)
    {
        cout <<"通讯录已满！"<<endl;
        return;
    }

    else
    {
        //输入姓名
        cout <<"请输入姓名！"<<endl;
        string name;
        cin >>name;
        abs->personarray[abs->size].name = name;

        //输入性别
        cout <<"请输入性别！"<<endl;
        cout <<"1---男"<<endl;
        cout <<"2---女"<<endl;
        int sex = 0;
        cin >>sex;
        abs->personarray[abs->size].sex = sex;

        //输入年龄
        cout <<"请输入年龄！"<<endl;
        int age = 0;
        cin >>age;
        abs->personarray[abs->size].age = age;

        //输入电话
        cout <<"请输入电话！"<<endl;
        string phone = "";
        cin >>phone;
        abs->personarray[abs->size].phone = phone;

        //输入地址
        cout <<"请输入地址！"<<endl;
        string addr = "";
        cin >>addr;
        abs->personarray[abs->size].addr = addr;

        //联系人数量+1
        abs->size += 1;
    }
    
    system("pause");
    system("cls");
}

//显示联系人
void showperson(struct addressbooks *abs)
{
   if(abs->size == 0)
   {
       cout <<"当前通讯录为空！"<<endl;
       //return;
   }
   else
   {
       for(int i = 0;i < abs->size;i++)
       {
           cout <<"姓名："<<abs->personarray[i].name<<"\t"<<"性别："<<(abs->personarray[i].sex == 1 ? "男" : "女")<<"\t"<<"年龄："<<abs->personarray[i].age<<
                  "\t"<< "电话："<<abs->personarray[i].phone<<"\t"<<"地址："<<abs->personarray[i].addr<<endl;
       }
   }
   
   system("pause");
   system("cls");
}

//判断联系人是否存在
int isexist(struct addressbooks * abs,string name)
{
    for(int i = 0;i < abs->size;i++)
    {
        if(abs->personarray[i].name == name)
        {
            return i;
            break;
        }
    }
    return -1;
}

//删除联系人
void delperson(struct addressbooks * abs)
{
    cout <<"请输入要删除联系人的姓名！"<<endl;
    string name = "";
    cin >>name;

    int exist = isexist(abs,name);

    if(exist != -1)
    {

      for(int i = exist;i<abs->size;i++)
      {
         abs->personarray[i] = abs->personarray[i+1];
      }

      (abs->size)--;
    }
    else
    {
        cout <<"查无此人！"<<endl;
    }
    
    system("pause");
    system("cls");
}

//查找指定联系人
void findperson(struct addressbooks * abs)
{
    cout <<"请输入将要查找的联系人姓名！"<<endl;
    string name = "";
    cin >>name;
    
    int exist = isexist(abs,name);
    
    if(exist != -1)
    {
        cout <<"姓名："<<abs->personarray[exist].name<<"  "<<"性别："<<abs->personarray[exist].sex<<"  "<<"年龄："<<abs->personarray[exist].age<<
               "  "<< "电话："<<abs->personarray[exist].phone<<"  "<<"地址："<<abs->personarray[exist].addr<<endl;
    }
    else
    {
        cout <<"查无此人！"<<endl;
    }
    
    system("pause");
    system("cls");
}

//修改联系人信息
void changeperson(struct addressbooks * abs)
{
    cout <<"请输入将要修改信息的联系人姓名！"<<endl;
    string name;
    cin >>name;
    
    int exist = isexist(abs,name);
    
    if(exist != -1)
    {
        //输入姓名
        cout <<"请输入姓名！"<<endl;
        string newname;
        cin >>newname;
        abs->personarray[exist].name = newname;

        //输入性别
        cout <<"请输入性别！"<<endl;
        cout <<"1---男"<<endl;
        cout <<"2---女"<<endl;
        int sex = 0;
        cin >>sex;
        abs->personarray[exist].sex = sex;

        //输入年龄
        cout <<"请输入年龄！"<<endl;
        int age = 0;
        cin >>age;
        abs->personarray[exist].age = age;

        //输入电话
        cout <<"请输入电话！"<<endl;
        string phone = "";
        cin >>phone;
        abs->personarray[exist].phone = phone;

        //输入地址
        cout <<"请输入地址！"<<endl;
        string addr = "";
        cin >>addr;
        abs->personarray[exist].addr = addr;
    }
    else
    {
        cout <<"查无此人！"<<endl;
    }
    
    system("pause");
    system("cls");
}

//清空通讯录
void cleanperson(struct addressbooks * abs)
{
    abs->size = 0;
    cout <<"通讯录已清空！"<<endl;
    
    system("pause");
    system("cls");
}

int main()
{
    int select = 0;
    struct addressbooks abs;
    abs.size = 0;

    while(1)
    {
        showmenu();
        cout <<"请输入选项！"<<endl;
        cin >> select;
        switch (select) {
        case 1://添加联系人
            addrperson(&abs);
            break;
        case 2://显示联系人
            showperson(&abs);
            break;
        case 3://删除联系人
            delperson(&abs);
            break;
        case 4://查找指定联系人
            findperson(&abs);
            break;
        case 5://修改联系人信息
            changeperson(&abs);
            break;
        case 6://清空通讯录
            cleanperson(&abs);
            break;
        case 0:
            cout <<"退出通讯录"<<endl;
            system("pause");
            return 0;
            break;
        default:
            break;
        }
    }

    return 0;
}