c++教程2021-6-9学习笔记

通讯录 增删改查

#include <iostream>
#include <stdlib.h>
//#include <unistd.h>
//#include "contacts.h"

using namespace std;

#include <string>

#define MAX_PERSON 1000

//联系人结构体
struct Person {
    string name;//姓名
    int sex;//性别1男 2 女
    int age;//年龄
    string phoneNumber; //联系电话
    string address;//家庭住址
};

//通讯录结构体
struct Contacts {
    struct Person perssonArray[MAX_PERSON];
    int size;//当前通讯录联系人个数
};

/**
 * 显示菜单
 */
void showMenu() {
    cout << "**********************" << endl;
    cout << "***** 1.新建联系人 *****" << 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.退出联系人 *****" << endl;
    cout << "**********************" << endl;
}


//添加联系人
void addPersion(Contacts *contact) {
    if (contact->size == MAX_PERSON) {
        cout << "联系人已满，无法添加新的联系人。" << endl;
        return;
    } else {
        string name;//姓名
        cout << "请输入联系人姓名：" << endl;
        cin >> name;
        contact->perssonArray[contact->size].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) {
            cin >> sex;
            if (sex == 1 || sex == 2) {
                contact->perssonArray[contact->size].sex = sex;
                break;
            }
            cout << "输入错误，请重新输入。" << endl;
        }

        cout << "请输入联系人年龄：" << endl;
        int age;//年龄
        cin >> age;
        contact->perssonArray[contact->size].age = age;

        cout << "请输入联系人电话：" << endl;
        string phoneNumber; //联系电话
        cin >> phoneNumber;
        contact->perssonArray[contact->size].phoneNumber = phoneNumber;

        cout << "请输入联系人家庭住址：" << endl;
        string address;//家庭住址
        cin >> address;
        contact->perssonArray[contact->size].address = address;

        contact->size++;
        cout << "联系人添加成功。" << endl;
        system("clear");
    }
}


//显示联系人：
void displayPerson(const Contacts *contacts) {
    if (contacts->size <= 0) {
        cout << "没有联系人。" << endl;
        return;
    } else {
        for (int i = 0; i < contacts->size; i++) {
            string sex = (contacts->perssonArray[i].sex == 1) ? "男" : "女";
            cout << "姓名：" << contacts->perssonArray[i].name << "\t性别:" << sex << "\t年龄:"
                 << contacts->perssonArray[i].age
                 << "\t电话：" << contacts->perssonArray[i].phoneNumber
                 << "\t家庭住址：" << contacts->perssonArray[i].address
                 << endl;
        }
    }
    system("clear");
}

//联系人是否存在。如果存在，返回数组的index，不存在返回-1
int exit(const Contacts const *contacts, string name) {
    int index = -1;
    for (int i = 0; i < contacts->size; i++) {
        if (contacts->perssonArray[i].name == name) {
            index = i;
        }
    }
    return index;
}

//删除联系人
void deletePerson(Contacts *contacts) {
    if (contacts->size <= 0) {
        cout << "没有联系人。" << endl;
        return;
    } else {
        cout << "请输入删除联系人姓名:" << endl;
        string name;
        cin >> name;
        int value = exit(contacts, name);
        if (value == -1) {
            cout << "没有此联系人。" << endl;
        } else {
            for (int i = value; i < contacts->size; ++i) {
                contacts->perssonArray[i] = contacts->perssonArray[i++];
            }
            contacts->size--;
        }
    }
    cout << "删除成功" << endl;
    system("clear");

}


//找到对应的联系人。
void findPerson(const Contacts *contacts) {
    if (contacts->size <= 0) {
        cout << "没有联系人。" << endl;
        return;
    }
    cout << "输入查找联系人:" << endl;
    string name;
    cin >> name;
    int value = exit(contacts, name);
    if (value == -1) {
        cout << "查无此人";
    } else {
        cout << "姓名：" << contacts->perssonArray[value].name << "\t";
        cout << contacts->perssonArray[value].age << "\t";
        cout << contacts->perssonArray[value].phoneNumber << "\t";
        cout << contacts->perssonArray[value].address << "\t";
        cout << endl;

    }
    system("clear");
}

void modifyPerson(Contacts *contacts) {

    if (contacts->size <= 0) {
        cout << "没有联系人。" << endl;
        return;
    }
    cout << "输入查找联系人:" << endl;
    string name;
    cin >> name;
    int value = exit(contacts, name);
    if (value == -1) {
        cout << "查无此人";
    } else {
        cout << "请输入联系人姓名："<<endl;
        string name1;
        cin >> name1;
        contacts->perssonArray[value].name = name1;

        cout << "请输入联系人年龄："<<endl;
        int age;
        cin >> age;
        contacts->perssonArray[value].age = age;

        cout << "请输入联系人性别："<<endl;
        cout <<"1----->男"<<endl;
        cout <<"2----->女"<<endl;
        int sex = 0;
        while (true) {
            cin >> sex;
            if (sex==1 || sex ==2){
                contacts->perssonArray[value].sex = sex;
            break;
            }else{
               cout << "输入有误，请重新输入！"<<endl;
            }
        }

        cout << "请输入联系人地址："<<endl;
        string address;
        cin >> address;
        contacts->perssonArray[value].address = address;
        cout << "修改联系人完成。"<<endl;
    }
    system("clear");
}


void cleanContacts(Contacts * contacts){
    contacts->size == 0;
    cout << "清除联系人完成"<<endl;
    system("clear");
}

int main() {
    int select = 0;
    struct Contacts contacts;//定义通讯录的结构体
    contacts.size = 0;//初始化这个通讯录的size大小
    while (true) {
        showMenu();    //显示菜单
        cin >> select;
        switch (select) {
            case 0://0.退出联系人
                cout << "欢迎下次使用" << endl;
                return 0;
                break;
            case 1:  //1.新建联系人
                addPersion(&contacts);
                break;
            case 2://2.显示联系人
                displayPerson(&contacts);
                break;
            case 3://3.删除联系人
                deletePerson(&contacts);
                break;
            case 4://4.查找联系人
                findPerson(&contacts);
                break;
            case 5://5.修改联系人
                modifyPerson(&contacts);
                break;
            case 6://6.清空联系人
                cleanContacts(&contacts);
                break;
            default:
                break;
        }
    }
    return 0;
}