Read cin till EOF

Question

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?

It's an ideone thing. It pipes the input to your program, it doesn't enter it interactively. (How would the interactive console know that no more input will be coming?) — molbdnilo, Apr 15 '16 at 13:46
@molbdnilo That's what I suspected... I just wasn't sure if gcc would let me extract to the end of `cin`, and since I don't have gcc available locally I thought I'd ask. Could you put that down as an answer? — Jonathan Mee, Apr 15 '16 at 13:56
@πάνταῥεῖ I suppose so but, at least with http://coliru.stacked-crooked.com/ I'm doing the pipe myself. There isn't an indication of how http://ideone.com takes in the string I put in the "Input" text-box. — Jonathan Mee, Apr 15 '16 at 14:13
@MartjinPieters Are they burninating the ideone tag? Cause if not it really does seem to have a place in this question? — Jonathan Mee, Aug 12 '17 at 02:10

score 0 · Accepted Answer · answered May 13 '16 at 11:25

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.

Read cin till EOF

1 Answers1

Linked