#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
#include <string>
#include <fstream>
#include <Windows.h>

using namespace std;

struct contact {
    char name[40];
    char mobile_phone[20];
    char home_phone[20];
    char work_phone[20];
};


void add_contact(const char* name, const char* mobile_phone, const char* home_phone, const char* work_phone) {

    ofstream fout;
    fout.open("base.txt", ios::app);

    if (!fout.is_open()) {
        cout << "Ошибка открытия файла" << endl;
    }
    else {
        fout << name << endl << mobile_phone << endl << home_phone << endl << work_phone << endl << endl;

        fout.close();
    }

}

void del_contact(const char* name) {

    ifstream fin;
    ofstream fout;
    fin.open("base.txt");
    fout.open("base2.txt");

    if (!fin.is_open() || !fout.is_open()) {
        cout << "Ошибка открытия файла" << endl;
    }
    else {

        contact cont;

        while (!fin.eof()) {
            fin >> cont.name >> cont.mobile_phone >> cont.home_phone >> cont.work_phone;

            if (strcmp(name, cont.name)) {
                fout << cont.name << endl << cont.mobile_phone << endl << cont.home_phone << endl << cont.work_phone << endl << endl;
            }
        }
        fin.close();
        fout.close();
        remove("base.txt");
        rename("base2.txt", "base.txt");
    }
}

void find_contact_name(const char* name) {
    ifstream fin;
    fin.open("base.txt");

    if (!fin.is_open()) {
        cout << "Ошибка открытия файла" << endl;
    }
    else {

        contact cont;

        while (!fin.eof()) {
            fin >> cont.name >> cont.mobile_phone >> cont.home_phone >> cont.work_phone;

            if (!strcmp(name, cont.name)) {
                cout << cont.name << endl << cont.mobile_phone << endl << cont.home_phone << endl << cont.work_phone << endl << endl;
            }
        }
        fin.close();
    }
}

void show_all_contacts() {
    ifstream fin;
    fin.open("base.txt");

    if (!fin.is_open()) {
        cout << "Ошибка открытия файла" << endl;
    }
    else {

        contact cont;

        while (!fin.eof()) {
            fin >> cont.name >> cont.mobile_phone >> cont.home_phone >> cont.work_phone;

            cout << cont.name << endl << cont.mobile_phone << endl << cont.home_phone << endl << cont.work_phone << endl << endl;
        }
        fin.close();
    }
}

int main() {

    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);


    add_contact("Иван", "+79111111111", "111111", "222222");
    add_contact("Оля", "+79111114444", "111144", "222244");
    add_contact("Женя", "+79111115555", "111155", "222255");
    add_contact("Саша", "+79111116666", "111166", "222266");

    show_all_contacts();

    del_contact("Женя");

    show_all_contacts();

    find_contact_name("Саша");
}