题解 | #自动售货系统#

oop

#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
#include <sstream>
#include <algorithm>

using namespace std;

class RendMach {
public:
    void init(const string& cmd) {
        stringstream ss(cmd);
        char r;
        char sbl;
        ss >> r >> m_product["A1"][1] >> sbl >> m_product["A2"][1] >> sbl
        >> m_product["A3"][1] >> sbl >> m_product["A4"][1] >> sbl 
        >> m_product["A5"][1] >> sbl >> m_product["A6"][1]
        >> m_moneyCnt[1] >> sbl >> m_moneyCnt[2] >> sbl
        >> m_moneyCnt[5] >> sbl >> m_moneyCnt[10];

        cout << "S001:Initialization is successful" << endl;
    }

    void coinIn(const string& cmd) {
        stringstream ss(cmd);
        char p;
        int page;
        ss >> p >> page;
        if (page != 1 && page != 2 && page != 5 && page != 10) {
            cout << "E002:Denomination error" << endl;
            return;
        }

        if (m_moneyCnt[1] + m_moneyCnt[2] * 2 < page) {
            cout << "E003:Change is not enough, pay fail" << endl;
            return;
        }

        bool flag = false;
        for (auto pdct : m_product) {
            if (pdct.second[1] > 0) flag = true;
        }
        if (!flag) {
            cout << "E005:All the goods sold out" << endl;
            return;
        }

        ++m_moneyCnt[page];
        m_inBalance += page;

        cout << "S002:Pay success,balance=" << m_inBalance << endl;
        return;
    } 

    void buy(const string& cmd) {
        stringstream ss(cmd);
        char b;
        string name;
        ss >> b >> name;

        if (m_product[name].empty()) {
            cout << "E006:Goods does not exist" << endl;
            return;
        }
        if (m_product[name][1] == 0) {
            cout << "E007:The goods sold out" << endl;
            return;
        }
        if (m_inBalance < m_product[name][0]) {
            cout << "E008:Lack of balance" << endl;
            return;
        }

        --m_product[name][1];
        m_inBalance -= m_product[name][0];
        cout << "S003:Buy success,balance=" << m_inBalance << endl;

        return;
    }

    void coinOut() {
        if (m_inBalance == 0) {
            cout << "E009:Work failure" << endl;
            return;
        }

        vector<int> outCoin(4, 0);
        while (m_inBalance >= 10) {
            if (m_moneyCnt[10] == 0) break;
            --m_moneyCnt[10];
            ++outCoin[3];
            m_inBalance -= 10;
        }
        while (m_inBalance >= 5) {
            if (m_moneyCnt[5] == 0) break;
            --m_moneyCnt[5];
            ++outCoin[2];
            m_inBalance -= 5;
        }
        while (m_inBalance >= 2) {
            if (m_moneyCnt[2] == 0) break;
            --m_moneyCnt[2];
            ++outCoin[1];
            m_inBalance -= 2;
        }
        while (m_inBalance >= 1) {
            if (m_moneyCnt[1] == 0) break;
            --m_moneyCnt[1];
            ++outCoin[0];
            m_inBalance -= 1;
        }
        
        cout << "1 yuan coin number=" << outCoin[0] << endl;
        cout << "2 yuan coin number=" << outCoin[1] << endl;
        cout << "5 yuan coin number=" << outCoin[2] << endl;
        cout << "10 yuan coin number=" << outCoin[3] << endl;

    }

    void query(const string& cmd) {
        if (cmd.size() != 3 || cmd[1] != ' ' || (cmd[2] != '0' && cmd[2] != '1')) {
            cout << "E010:Parameter error" << endl;
            return;
        }
        else if (cmd[2] == '0') {
            vector<pair<string, vector<int>>> info;
            for (auto p : m_product) {
                info.push_back(p);
            }
            sort(info.begin(), info.end(), [](const pair<string, vector<int>>& a, const pair<string, vector<int>>& b) {
                if (a.second[1] > b.second[1]) {
                    return true;
                }
                else if (a.second[1] == b.second[1] && a.first < b.first) {
                    return true;
                }
                else return false;
            });
            for (auto res : info) {
                cout << res.first << ' ' << res.second[0] << ' ' << res.second[1] << endl;
            }
        }
        else if (cmd[2] == '1') {
            for (auto p : m_moneyCnt) {
                cout << p.first << " yuan coin number=" << p.second << endl;
            }
        }
    }
    
private:
    int m_inBalance = 0;
    unordered_map<string, vector<int>> m_product = {
        {"A1", {2, 0}},
        {"A2", {3, 0}},
        {"A3", {4, 0}},
        {"A4", {5, 0}},
        {"A5", {8, 0}},
        {"A6", {6, 0}}
    };
    unordered_map<int, int> m_moneyCnt = {{1, 0}, {2, 0}, {5, 0}, {10, 0}};
};

int main() {
    string str;
    RendMach render;

    while(getline(cin, str, ';')) {
        if (str[0] == 'r') {
            render.init(str);
        }
        else if (str[0] == 'p') {
            render.coinIn(str);
        }
        else if (str[0] == 'b') {
            render.buy(str);
        }
        else if (str[0] == 'c') {
            render.coinOut();
        }
        else if (str[0] == 'q') {
            render.query(str);
        }
    }
}