C++学习（4）——通讯录管理程序

复习简单操作，实现一个非常非常简单的通讯录管理小程序

#include <iostream>
using namespace std;
#include <string>
constexpr auto MAX = 1000; //通讯录最大人数;

//设计联系人结构体
struct Person{
    string m_Name;   //姓名
    int m_Sex;   //性别
    int m_Age;  //年龄
    string m_Phone; //电话
    string m_Addr;  //住址
};

//设计通讯录结构体
struct Addressbooks{
    //通讯录中保存的联系人数组
    struct  Person personArray[MAX];
    //通讯录中当前记录联系人个数
    int m_Size;
};

//1、添加联系人
void addPerson(Addressbooks *abs){
    //判断通讯录是否已满，满了则不再添加
    if (abs->m_Size == MAX){
        cout << "通讯录已满，无法添加" << endl;
        return;
    }
    else {
        //添加具体联系人

        //姓名
        string name;
        cout << "请输入姓名：" << endl;
        cin >> name;
        abs->personArray[abs->m_Size].m_Name = name;
        //性别
        cout << "请输入性别：" << endl;
        cout << "1——男" << endl;
        cout << "2——女" << endl;
        int sex = 0;
        while (true) {
            cin >> sex;
            if (sex == 1 || sex == 2) {
                abs->personArray[abs->m_Size].m_Sex = sex;
                break;
            }
            cout << "输入有误，请重新输入" << endl;
        }
        //年龄
        cout << "请输入年龄：" << endl;
        int age = 0;
        cin >> age;
        abs->personArray[abs->m_Size].m_Age = age;
        //电话
        cout << "请输入联系电话：" << endl;
        string phone;
        cin >> phone;
        abs->personArray[abs->m_Size].m_Phone = phone;
        //住址
        cout << "请输入家庭住址：" << endl;
        string address;
        cin >> address;
        abs->personArray[abs->m_Size].m_Addr = address;
        //更新通讯录人数
        abs->m_Size++;
        cout << "添加成功" << endl;

        system("pause");  //请按任意键继续
        system("cls");  //清屏功能
    }
}

//2、显示联系人
void showPerson(Addressbooks *abs) {
    //判断通讯录中人数是否为0
    if (abs->m_Size == 0) {
        cout << "当前记录为空" << endl;
    }
    //不为0时，显示联系人信息
    else {
        for (int i = 0; i < abs->m_Size; i++) {
            cout << "姓名：" << abs->personArray[i].m_Name << "\t";
            cout << "性别：" << (abs->personArray[i].m_Sex  == 1?"男":"女")<< "\t";
            cout << "年龄：" << abs->personArray[i].m_Age << "\t";
            cout << "电话：" << abs->personArray[i].m_Phone << "\t";
            cout << "住址：" << abs->personArray[i].m_Addr << endl;
        }
    }
        system("pause");
        system("cls");
}

//3、删除联系人
/*检测联系人是否存在*/
int isExist(Addressbooks *abs,string name){
    for (int i = 0; i < abs->m_Size; i++) {
        if (abs->personArray[i].m_Name == name) {
            return i;
        }
    }
    return -1;
}
/*删除指定联系人*/
void deletePerson(Addressbooks *abs) {
    cout << "请输入您要删除的联系人：" << endl;
    string name;
    cin >> name;

    int ret = isExist(abs, name);

    if (ret != -1) {
        for (int i = ret; i < abs->m_Size; i++) {
            abs->personArray[i] = abs->personArray[i + 1];
        }
        abs->m_Size--;
        cout << "删除成功" << endl;
    }
    else {
        cout << "查无此人" << endl;
    }
    system("pause");  //请按任意键继续
    system("cls");  //清屏功能
}

//4、查找联系人
void findPerson(Addressbooks *abs) {
    cout << "请输入您要查找的联系人：" << endl;
    string name;
    cin >> name;
    
    int ret = isExist(abs, name);

    if (ret != -1) {
        cout << "姓名：" << abs->personArray[ret].m_Name<<"\t";
        cout << "性别：" << (abs->personArray[ret].m_Sex == 1 ? "男" : "女") << "\t";
        cout << "年龄：" << abs->personArray[ret].m_Age << "\t";
        cout << "电话：" << abs->personArray[ret].m_Phone << "\t";
        cout << "住址：" << abs->personArray[ret].m_Addr << endl;

    }
    else {
        cout << "查无此人" << endl;
    }
    system("pause");  //请按任意键继续
    system("cls");  //清屏功能
}

//5、修改联系人
void modefyPerson(Addressbooks *abs) {
    cout << "请输入您要修改的联系人：" << endl;
    string name;
    cin >> name;

    int ret = isExist(abs, name);
    if (ret!=-1){
        //姓名
        string name;
        cout << "请输入姓名：" << endl;
        cin >> name;
        abs->personArray[ret].m_Name = name;
        //性别
        int sex=0;
        cout << "请输入性别：" << endl;
        cout << "1——男" << endl;
        cout << "2——女" << endl;
        while (true) {
            cin >> sex;
            if (sex == 1 || sex == 2) {
                abs->personArray[ret].m_Sex = sex;
                break;
            }
            cout << "输入有误，请重新输入" << endl;
        }
        //年龄
        cout << "请输入年龄：" << endl;
        int age = 0;
        cin >> age;
        abs->personArray[ret].m_Age = age;
        //电话
        cout << "请输入联系电话：" << endl;
        string phone;
        cin >> phone;
        abs->personArray[ret].m_Phone = phone;
        //住址
        cout << "请输入家庭住址：" << endl;
        string address;
        cin >> address;
        abs->personArray[ret].m_Addr = address;
    }
    else {
        cout << "查无此人" << endl;
    }
    system("pause");  //请按任意键继续
    system("cls");  //清屏功能
}

//6、清空联系人
void cleanPerson(Addressbooks *abs) {
    abs->m_Size = 0;   //静态内存在进程结束时自动释放，无需其他操作
    cout << "通讯录已清空" << endl;
    system("pause");  //请按任意键继续
    system("cls");  //清屏功能
}

//菜单界面
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;
}

int main()
{
    //创建通讯录的结构体变量
    Addressbooks abs;
    //初始化通讯录中当前人员个数
    abs.m_Size = 0;

    int select = 0;   //创建用户选择输入的变量

    while (true)
    {
        //菜单调用
        showMenu();

        cin >> select;

        switch (select)
        {
        case 1:     //1、添加联系人
            addPerson(&abs);   //利用地址传递通过修改形参来修改实参
            break;
        case 2:     //2、显示联系人
            showPerson(&abs);
            break;
        case 3:     //3、删除联系人
            deletePerson(&abs);
            break;
        case 4:     //4、查找联系人
            findPerson(&abs);
            break;
        case 5:     //5、修改联系人
            modefyPerson(&abs);
            break;
        case 6:     //6、清空联系人
            break;
        case 0:     //0、退出通讯录
            cout << "欢迎下次使用" << endl;
            system("pause");
            return 0;
            break;
        default:
            break;
        }
    }

    system("pause");
    return 0;
}