c++ - 如何使用Enter键创建新行，而不是输入字符串？

Question

我必须编写一个程序，允许用户输入多行诗，按Enter键在诗中创建新行。这首诗的所有行都需要存储在单个字符串中，而且我不确定如何将“\ n”连接到用户输入。另外，一旦用户读完了这首诗，我就不确定如何继续前进并在程序中执行更多代码。
这是我到目前为止的代码:

/*
Poetry In Motion; Cortez Phenix
This program allows the user to make a poem, and the program contains a
poem game. The most notable features are loops controlled by the user.
*/

#include <string>
#include <iostream>
using namespace std;

void makePoem()
{
    string user_input;
    cout << "Enter a poem of your own creation, one line at a time.\n";
    cout << "Type 'quit' to exit the program.\n\n";

    cout << "Type your poem, pressing the enter key to create a new line.\n\n";
    cin >> user_input;

    if (user_input  == "quit")
    {
        cout << "\nGoodbye! Have a great day.\n";
    }
    else
    {
        getline(cin, user_input);
    }

}

int main()
{
    makePoem();
    return 0;
}
 

如果这个问题太含糊或类似，我们深表歉意。谢谢您的帮助。

Answer 1

您需要循环读取用户的输入，并将每行追加到目标string，例如:

/*
Poetry In Motion; Cortez Phenix
This program allows the user to make a poem, and the program contains a
poem game. The most notable features are loops controlled by the user.
*/

#include <string>
#include <iostream>
using namespace std;

void makePoem()
{
    string poem;
    string user_input;

    cout << "Enter a poem of your own creation, one line at a time.\n";
    cout << "Type 'quit' to exit the program.\n\n";

    cout << "Type your poem, pressing the enter key to create a new line.\n\n";

    while (getline(cin, user_input))
    {
        if (user_input == "quit")
            break;

        poem += user_input;
        poem += '\n';
    }

    cout << "\nGoodbye! Have a great day.\n";
}

int main()
{
    makePoem();
    return 0;
}