eof

I am going through C++ Primer (5th ed). In section 1.4.4, there is the following example: #include <iostream> int main() { // currVal is the number we're counting; we'll read new values into val int currVal = 0, val = 0; // read first number and ensure that we have data to process if (std::cin >> currVal) { int cnt = 1; // store the count for the current value we're processing while (std::cin >> val) { // read the remaining numbers if (val == currVal) // if the values are the same ++cnt; // add 1 to cnt else { // otherwise, print the count for the previous value std::cout << currVal << "

Here is minimal complete example: import Control.Monad import System.IO loop :: IO () loop = do line <- getLine putStrLn line eof <- isEOF unless eof loop main = loop This program is supposed to read a line, print it out, stop if there is 'end of file' character in stdin . It doesn't leave the loop at all. If I put eof <- isEOF before putStrLn line the program behaves very strange (try it!). I cannot get it at all: how putStrLn can possibly affect input stream and why doesn't the program terminate when I put 'end of file' character into stream (with Ctrl+D )? Description of program's behavior

I've just encountered a curious situation in C++. I was doing something like: istream in; // ... in.get(); // get a char (which turns out to be the last) // curiously ios::eof bit doesn't get set just yet c = in.peek(); // attempt to peek, return EOF and now set ios::eof bit if(c == EOF) { // realize shouldn't have gotten the last char for some reason in.unget(): // attempt to unget, *fails* (because ios:eof bit was set) } Now I'm curious why peek sets the eof bit; I find this highly unintuitive. It's supposed to just peek not actually consume anything and shouldn't change the stream state.

I have gone through many posts on SO , but still i am not able to resolve the issue . I have to read : text pattern1 pattern2 from standard input , there are many text and patterns . Code : string t,p1,p2; while(getline(cin, t)) { cin>>p1; cin>>p2; cout<<"text is = "<<t<<"\np1 is = "<<p1<<"\np2 is = "<<p2<<endl; } Input file : hammer ham mer gogoa go z gogoa g o Output : text is = hammer p1 is = ham p2 is = mer text is = p1 is = gogoa p2 is = go text is = p1 is = z p2 is = gogoa text is = p1 is = g p2 is = o Marco A. If you're using getline after cin >> something , you need to flush the

Using python pty module, i want to send some commands to the terminal emulator, using a function as stdin (as pty module wants), and then force quitting. I thought about something like import pty cmnds = ['exit\n', 'ls -al\n'] # Command to send. I try exiting as last command, but it doesn't works. def r(fd): if cmnds: cmnds.pop() # It seems is not executing sent commands ('ls -al\n') else: # Can i quit here? Can i return EOF? pass pty.spawn('/bin/sh', r) Thank you Firstly, the pty module does not allow you to communicate with the terminal emulator Python is running in. Instead, it allows

Bit of background, I'm writing a program that plays the game "boxes" it runs in linux command line and is written in C. There's a prompt that waits for user input and then is read with fgets() and interpretted etc. As part of the task specification I have to return a specific error if I reach "End of file while waiting for user input". I understand that fgets() returns null when it reaches EOF... but say I have fgets(input,max_buffer,stdin); in a prompt loop if the user exits prematurely say with CTRL+C or CTRL+D does this mean that input == NULL? Can I even detect when a user does this with