C++98 代码实现游戏机排队系统

#include #include #include #include

using namespace std;

int main() { int n; cin >> n; queue q; // 用于存储排队的人 set playing; // 用于存储正在游玩的人

for (int i = 0; i < n; i++) {
    string event;
    cin >> event;

    if (event == "start") {
        if (playing.empty()) {
            cout << "Error" << endl;
        } else {
            stringstream ss;
            int count = 0;
            while (!q.empty() && count < 2) {
                string person = q.front();
                q.pop();
                playing.erase(person);
                ss << person << " ";
                count++;
            }
            cout << ss.str() << endl;
        }
    } else {
        string person;
        cin >> person;
        if (event == "arrive") {
            if (playing.count(person) != 0 || q.size() >= 2) {
                cout << "Error" << endl;
            } else {
                q.push(person);
                playing.insert(person);
                cout << "OK" << endl;
            }
        } else if (event == "leave") {
            if (playing.count(person) == 0) {
                cout << "Error" << endl;
            } else {
                playing.erase(person);
                cout << "OK" << endl;
            }
        }
    }
}

return 0;

}