C++Note 通讯录管理系统___案例

#include <iostream>
using namespace std;
#define MAX 1000//最大人数

//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;
}
//联系人结构体   string姓名 int性别 int年龄 string电话 string住址
struct Person
{
    string m_Name;//姓名
    int m_Sex;//性别 1 男 2 女
    int m_Age;//年龄
    string m_Phone;//电话
    string m_Addr;//住址
};
//通讯录结构体
struct Addressbooks
{
    Person personArray[MAX];//通讯录中保存的联系人数组
    int m_Size;//通讯录中人员个数
};
//检测联系人是否存在 存在则返回联系人在数组中位置 不存在则返回 -1
int isPersonExist(Addressbooks* abs, string name)
{
    for (int i = 0; i < abs->m_Size; i++)
    {
        //找到用户输入
        if (abs->personArray[i].m_Name == name)
        {
            return i;
        }
    }
    return -1;//未找到则返回 -1
}
//1.添加联系人
void addPerson(Addressbooks* abs)
{
    //先判断通讯录是否满 已满不再添加
    if (abs->m_Size == MAX)
    {
        cout << "人数已满,无法添加!";
        return;
    }
    else
    {
        //添加具体联系人
        string name;
        cout << "请输入联系人姓名: " << endl;
        cin >> name;
        abs->personArray[abs->m_Size].m_Name = name ;
        cout << "请输入联系人性别: " << endl;
        cout << "1 --- 男" << endl;
        cout << "2 --- 女" << endl;
        int sex = 0;
        while (true)
        {
            //如果输入的是 1 或 2 可以退出循环
            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;
        }
        cout << "请输入联系人年龄: " << endl;
        int age = 0;
        while (true)
        {
            cin >> age;
            if (age >= 0 && age <= 150)
            {
                abs->personArray[abs->m_Size].m_Age = age;
                break;
            }
            cout << "输入有误,请重新输入" << endl;
        }
        cout << "请输入联系人电话: " << endl;
        string phone;
        cin >> phone;
        abs->personArray[abs->m_Size].m_Phone = phone;
        cout << "请输入联系人地址: " << endl;
        string addr;
        cin >> addr;
        abs->personArray[abs->m_Size].m_Addr = addr;
        //更新通讯录人数
        abs->m_Size++;
        cout << "联系人添加成功!" << endl;
        system("pause");//请按任意键结束
        system("cls");//清屏
    }
}
//2.显示联系人
void showPerson(Addressbooks* abs)
{
    if (abs->m_Size == 0)//判断通讯录人数是否为0
    {
        cout << "当前通讯录没有联系人!" << endl;
    }
    else
    {
        for (int i = 0; i < abs->m_Size; i++)
        {
            cout << "姓名:" << abs->personArray[i].m_Name;
            if (abs->personArray[i].m_Sex == 1)
            {
                cout << "  性别:男";
            }
            else
            {
                cout << "  性别:女";
            }
            cout << "  年龄:" << abs->personArray[i].m_Age 
                << "  电话:" << abs->personArray[i].m_Phone 
                << "  地址:" << abs->personArray[i].m_Addr << endl;
        }
    }
    system("pause");
    system("cls");
}
//3.删除联系人
void deletePerson(Addressbooks* abs)
{
    cout << "请输入要删除联系人的姓名:" << endl;
    string name;
    cin >> name;
    int ret = isPersonExist(abs, name);// i为正数 则找到  i为 -1 则未找到联系人
    if (ret != -1)
    {
        //删除一个数值 将后续的数值统一前移覆盖前一内容  然后数组大小减一
        for (int i = ret; i < abs->m_Size; i++)
        {
            abs->personArray[i] = abs->personArray[i + 1];//数据前移
        }
        abs->m_Size--;//更新通讯录
        cout << "删除成功!" << endl;
    }
    else
    {
        cout << "查无此人!" << endl;
    }
    system("pause");
    system("cls");
}
//4.查找联系人
void findPerson(Addressbooks* abs)
{
    cout << "请输入要查找联系人的姓名:" << endl;
    string name;
    cin >> name;
    int ret = isPersonExist(abs, name);// i为正数 则找到  i为 -1 则未找到联系人
    if (ret != -1)
    {
        cout << "姓名:" << abs->personArray[ret].m_Name;
        if (abs->personArray[ret].m_Sex == 1)
        {
            cout << "  性别:男";
        }
        else
        {
            cout << "  性别:女";
        }
        cout << "  年龄:" << abs->personArray[ret].m_Age
            << "  电话:" << abs->personArray[ret].m_Phone
            << "  地址:" << abs->personArray[ret].m_Addr << endl;
    }
    else
    {
        cout << "查无此人!" << endl;
    }
    system("pause");
    system("cls");
}
//5.修改联系人
void modifyPerson(Addressbooks* abs)
{
    cout << "请输入要修改联系人的姓名:" << endl;
    string name;
    cin >> name;
    int ret = isPersonExist(abs, name);// i为正数 则找到  i为 -1 则未找到联系人
    if (ret != -1)
    {
        //修改联系人
        string name;
        cout << "请修改此联系人姓名: " << endl;
        cin >> name;
        abs->personArray[ret].m_Name = name;
        cout << "请修改此联系人性别: " << endl;
        cout << "1 --- 男" << endl;
        cout << "2 --- 女" << endl;
        int sex = 0;
        while (true)
        {
            //如果输入的是 1 或 2 可以退出循环
            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;
        }
        cout << "请修改此联系人年龄: " << endl;
        int age = 0;
        while (true)
        {
            cin >> age;
            if (age >= 0 && age <= 150)
            {
                abs->personArray[ret].m_Age = age;
                break;
            }
            cout << "输入有误,请重新输入" << endl;
        }
        cout << "请修改此联系人电话: " << endl;
        string phone;
        cin >> phone;
        abs->personArray[ret].m_Phone = phone;
        cout << "请修改此联系人地址: " << endl;
        string addr;
        cin >> addr;
        abs->personArray[ret].m_Addr = addr;
    }
    else
    {
        cout << "查无此人!" << endl;
    }
    system("pause");
    system("cls");
}
//6.清空联系人
void cleanPerson(Addressbooks* abs)
{
    abs->m_Size = 0;
    cout << "通讯录已清空!" << endl;
    system("pause");
    system("cls");
}
int main()
{
    // 创建通讯录的结构体变量
    Addressbooks abs;
    abs.m_Size = 0;
    int select = 0;//用户选择输入的变量
    while (true)
    {
        showMenu();//菜单调用
        cin >> select;//用户输入
        switch (select)
        {
        case 1://添加联系人
            addPerson(&abs);//地址传递 可以修改实参
            break;
        case 2://显示联系人
            showPerson(&abs);
            break;
        case 3://删除联系人
            deletePerson(&abs);
            break;
        case 4://查找联系人
            findPerson(&abs);
            break;
        case 5://修改联系人
            modifyPerson(&abs);
            break;
        case 6://清空联系人
        {
            cout << "确认是否清空通讯录:" << endl;
            cout << "1 --- 是" << endl;
            cout << "按任意键取消" << endl;
            int i = 0;
            cin >> i;
            if (i == 1)
            {
                cleanPerson(&abs);
            }
            else
            {
                system("pause");
                system("cls");
            }
            break;
        }    
        case 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;
}