程序输入仅识别单词而不是行

Question

我为一个学校项目编写了这个程序，用户输入最多4行文本，然后输入“end”，然后以相反的顺序重复它们。它工作正常，除了识别“线”只有1个字所以如果我尝试键入一条线（例如快速棕色狐狸跳过日志）它不会将其用作一条线而是每个字都是一条线。

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

int main()
{
        string l1;
        string l2;
        string l3;
        string l4;
        string l5;
        bool end (false);
        while (end == false)
{
        cout<<"Welcome! Type one sentence then press enter, up to 4 sentences. When finished$
        cin >> l1;
        if (l1 == "end")
        {
        cout << "Error! Must enter at least 1 line of text!" << endl;
        break;
        }
        cin >> l2;
        if (l2 == "end")
        {
        cout<<l1<<endl;
        end = true;
        break;
        }
        cin >> l3;
        if (l3 == "end")
        {
        cout<<l2<<endl;
        cout<<l1<<endl;
        end = true;
        break;
        }
        cin >> l4;
        if (l4 == "end")
        {
        cout<<l3<<endl;
        cout<<l2<<endl;
        cout<<l1<<endl;
        end = true;
        break;
        }
        cin >> l5;
        if (l5 == "end")
        {
        cout<<l4<<endl;
        cout<<l3<<endl;
        cout<<l2<<endl;
        cout<<l1<<endl;
        end = true;
        break;
        }
        else
        {
        cout<<"Error! Please enter 4 or less lines"<<endl;
        break;
        }

}

}

Answer 1

使用std::getline代替operator>>。 operator>>读取单词，而不是文本行。