c++ char 数组，在cin.getline()中使用
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c++ char arrays, use in cin.getline()
提问by BrainPermafrost
I have the following code:
我有以下代码：
char myText[256];
cin.getline(myText,256);
Why exactly do I have to pass a character array to cin.getline() and not a string?
为什么我必须将字符数组传递给 cin.getline() 而不是字符串？
I have read that in general it is better to use strings than character arrays. Should I then convert a character array to a string after retrieving input with cin.getline(), if that is possible?
我读过一般来说使用字符串比使用字符数组更好。如果可能的话，我应该在用 检索输入后将字符数组转换为字符串cin.getline()吗？
采纳答案by FailedDev
You are using the member method of istream. In this case cin. This function's details can be found here :
您正在使用 istream 的成员方法。在这种情况下，cin。可以在此处找到此功能的详细信息：
http://en.cppreference.com/w/cpp/io/basic_istream/getline
http://en.cppreference.com/w/cpp/io/basic_istream/getline
However you could use std::getline
但是你可以使用 std::getline
Which uses a string instead of a char array. It's easier to use string since they know their sizes, they auto grow etc. and you don't have to worry about the null terminating character and so on. Also it is possible to convert a char array to a string by using the appropriate string contructor.
它使用字符串而不是字符数组。使用字符串更容易，因为它们知道它们的大小，它们会自动增长等，而且您不必担心空终止字符等。也可以使用适当的字符串构造函数将字符数组转换为字符串。
回答by R. Martinho Fernandes
That's an unfortunate historical artifact, I believe.
我相信，这是一件不幸的历史文物。
You can however, use the std::getlinefree function instead.
但是，您可以改用std::getline免费功能。
std::string myText;
std::getline(std::cin,myText);
