Read cin till EOF

问题

I was working on an example for this answer and I noticed that http://ideone.com will let me read till EOF from cin but Visual Studio 2015 will not.

For example, given the program:

string i;

while(cin >> i) cout << i << endl;

I can give the input:

Lorem Ipsum

And http://ideone.com will terminate: http://ideone.com/22uNOr

Visual Studio 2015 will continue waiting for input however until I press Ctrl + Z and hit Enter

Is this a gcc/Visual Studio difference or just something http://ideone.com is doing?

回答1:

On http://ideone.com you can provide input on the "input" tab. Anything inputted into this box will be fed to cin appended with an eof character.

For example if you do:

while (cin.get() != decltype(cin)::traits_type::eof());

On your local machine that will never come back till you press Ctrl + z and press Enter But on http://ideone.com it will always return after parsing everything typed into the "input" tab.

来源：https://stackoverflow.com/questions/36648775/read-cin-till-eof