使用`cin >>后使用`getline(cin, s);`n;`
int n;
std::cin >> n;
std::string s = "";
std::getline(cin, s);
我注意到如果我使用 cin，我的程序会在下次到达 getline(cin, rangeInput) 行时挂起.
I noticed that if I use cin, my program would hang the next time I reach the line getline(cin, rangeInput).
既然 getline() 正在使用 cin，那么如果我以前使用过 cin，这是否会导致程序挂起?使用cin后想得到一行怎么办?
Since getline() is using cin, is that why it is causing the program to hang if I have previously used cin? What should I do if I want to get a line after using cin?
推荐答案
您需要清除输入流 - 尝试在您的 cin 后添加以下内容:
You need to clear the input stream - try adding the following after your cin:
cin.clear();
cin.ignore(std::numeric_limits<std::streamsize>::max(), '
');
this 问题的公认答案很好地解释了为什么/当需要时.
The accepted answer to this question gives a good explanation of why/when this is required.
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