r3wt4

#include "pch.h"
#include <iostream>
#include <string>
#include <fstream>
#include <windows.h>
#include <map>
#include <vector>


using namespace std;

vector<string> *names = new vector<string>();
map<int, int> costMap;
map<int, int> countMap;
int countNumbers = 0;

void getMenu() {
    cout << "команды: " << endl;
    cout << "1) поиск товара по номеру " << endl;
    cout << "2) поиск товаров по наименованию " << endl;
    cout << "3) покупка товара " << endl;
    cout << "4) изменение цены товара " << endl;
    cout << "5) добавление нового товара " << endl;
    cout << "0) завершение работы " << endl;
}


class Data {
protected:
    int number;
    int cost;
    int countx;
    string word;
    string nameOfPosition;
public:
    void inputData() {
        ifstream file;
        file.open("shopdatabase.txt");
        while (file >> word) {
            if (word == "Номер:") {
                file >> number;
                countNumbers++;
            }
            if (word == "Наименование:") {
                file >> word;
                names->push_back(word);
            }
            if (word == "Цена:") {
                file >> cost;
                costMap.insert(pair<int, int>(number, cost));
            }
            if (word == "Количество:") {
                file >> countx;
                countMap.insert(pair<int, int>(number, countx));
            }
        }
        file.close();
    }
};

class search : public Data {
public:
    void searchNumber() {
        cout << "номер товара: ";
        cin >> number;
        auto it = names->begin();
        it += number - 1;
        if (number <= countNumbers) {
            cout << "Номер: " << number << endl;
            cout << "Наименование: " << *it << endl;
            cout << "Цена: " << costMap.at(number) << endl;
            cout << "Количество: " << countMap.at(number) << endl;
        }
        else {
            cout << "товара с таким номером не существует" << endl;
        }
    }

    void searchAllName() {
        number = 0;
        cout << "Поиск: ";
        cin >> word;
        for (auto it = names->begin(); it != names->end(); it++) {
            countx = 0;
            number++;
            nameOfPosition = *it;
            for (int i = 0; i < word.size(); i++) {
                if (word[i] == nameOfPosition[i]) {
                    countx++;
                }
            }
            if (countx == word.size()) {
                cout << "Номер: " << number << endl;
                cout << "Наименование: " << *it << endl;
                cout << "Цена: " << costMap.at(number) << endl;
                cout << "Количество: " << countMap.at(number) << endl;
            }
            else {
                cout << "Нет совпадений" << endl;
            }
        }
    }
};

class input : public Data {
public:
    void buy() {
        cout << "номер покупаемого товара: ";
        cin >> number;
        countMap.at(number)--;
    }
    void inputKol() {
        cout << "номер товара: ";
        cin >> number;
        cout << "новая цена товара: ";
        cin >> costMap.at(number);
    }
    void inputNew() {
        countNumbers++;
        cout << "наименование нового товара: ";
        cin >> word;
        names->push_back(word);
        cout << "количество нового товара: ";
        cin >> countx;
        cout << "цена нового товара: ";
        cin >> cost;
        countMap.insert(pair<int, int>(countNumbers, countx));
        costMap.insert(pair<int, int>(countNumbers, cost));
    }
};

template <typename t>
void update(t & file) {
    auto it = names->begin();
    for (int n = 1; n <= countNumbers; n++) {
        file << "№ " << n << endl;
        file << "Наименование: " << *it << endl;
        file << "Количество: " << countMap.at(n) << endl;
        file << "Цена: " << costMap.at(n) << endl;
        it++;
    }
}

search s;
input in;

void instructionsHandler() {
    int instruction;
    while (true) {
        cout << endl << "Ввдедите команду: ";
        cin >> instruction;
        if (instruction < 0 || instruction > 5) {
            cout << "нет такой команды" << endl;
            continue;
        }
        if (instruction == 1) {
            s.searchNumber();
            continue;
        }
        if (instruction == 2) {
            s.searchAllName();
            continue;
        }
        if (instruction == 3) {
            in.buy();
            continue;
        }
        if (instruction == 4) {
            in.inputKol();
            continue;
        }
        if (instruction == 5) {
            in.inputNew();
            continue;
        }
        if (instruction == 0) {
            break;
        }
    }
}

int main(int argc, char** argv) {
    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);

    in.inputData();
    getMenu();
    instructionsHandler();

    ofstream file;
    file.open("shopdatabase.txt");
    update<ofstream>(file);
    file.close();
    names->clear();
    delete names;
}