[程序在调用函数时会跳过用户输入

Question

我在类内部有一个称为Route的类，我有一个成员函数，当在main中调用它时，它应该向用户询问一些问题，例如，当我调用该函数时，它将显示：

Please enter the name of the address:
Please enter the time you want to leave:
Please enter the arrival time:

//this is the function//
Route create_route() {

    Route route_;
    std::string name;
    unsigned short int time;


    std::cout << "Please enter the name of the address: ";
    std::getline(std::cin, name);
    cin.ignore();
    route_.set_name(name);


    std::cout << "Please enter the time you want to leave: ";
    std::cin >> time;
    std::cin.ignore();
    route_.set_departure_time(time);


    std::cout << "Please enter the arrival time: ";
    std::cin >> time;
    std::cin.ignore();
    route_.set_arrival_time(time);

    return route_;
    }
    int main() {
    create_route();
    }

[当我运行程序时，它跳过了第一手用户的输入，我已经厌倦了放置

cin.ignore();

在第一个用户输入之后，它起作用了，但是然后跳过了第二个:(如果我放了cin.ignore（）;在每个用户输入之后，它仍然不起作用，任何建议都会有很大帮助！

Answer 1

仅在调用cin.ignore()之后，才应在调用std::getline()之后不调用operator>>。如果要调用ignore()跳过换行符，则应将'\n'作为ignore()的分隔符：

Route create_route() {
    Route route_;
    std::string name;
    unsigned short int time;

    std::cout << "Please enter the name of the address: ";
    std::getline(std::cin, name);
    route_.set_name(name);

    std::cout << "Please enter the time you want to leave: ";
    std::cin >> time;
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    route_.set_departure_time(time);

    std::cout << "Please enter the arrival time: ";
    std::cin >> time;
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    route_.set_arrival_time(time);

    return route_;
}

或者，使用std::getline()读取所有输入，然后使用std::istringstream解析它们：
Route create_route() {
    Route route_;
    std::string input;
    unsigned short int time;

    std::cout << "Please enter the name of the address: ";
    std::getline(std::cin, input);
    route_.set_name(input);

    std::cout << "Please enter the time you want to leave: ";
    std::getline(std::cin, input);
    std::istringstream(input) >> time;
    route_.set_departure_time(time);

    std::cout << "Please enter the arrival time: ";
    std::getline(std::cin, input);
    std::istringstream(input) >> time;
    route_.set_arrival_time(time);

    return route_;
}