Reading from text file until EOF repeats last line?

Just follow closely the chain of events Grab 10 Grab 20 Grab 30 Grab EOF Look at the second-to-last iteration. You grabbed 30, then carried on to check for EOF. You haven't reached EOF because the EOF mark hasn't been read yet ("binarically" speaking, its conceptual location is just after the 30 line).

Therefore you carry on to the next iteration. X is still 30 from previous iteration. Now you read from the stream and you get EOF.

X remains 30 and the ios::eofbit is raised. You output to stderr x (which is 30, just like in the previous iteration). Next you check for EOF in the loop condition, and this time you're out of the loop Try this: while (true) { int x; iFile >> x; if( iFile.eof() ) break; cerr Did you ever try to run it on an empty file?

The behaviour you get is for the exact same reason.

Just follow closely the chain of events. Grab 10 Grab 20 Grab 30 Grab EOF Look at the second-to-last iteration. You grabbed 30, then carried on to check for EOF.

You haven't reached EOF because the EOF mark hasn't been read yet ("binarically" speaking, its conceptual location is just after the 30 line). Therefore you carry on to the next iteration. X is still 30 from previous iteration.

Now you read from the stream and you get EOF. X remains 30 and the ios::eofbit is raised. You output to stderr x (which is 30, just like in the previous iteration).

Next you check for EOF in the loop condition, and this time you're out of the loop. Try this: while (true) { int x; iFile >> x; if( iFile.eof() ) break; cerr The behaviour you get is for the exact same reason.

5 use 'while(iFile >> x)'. This reads the integer and returns the stream. When a stream is used as bool value it checks to see if the stream is valid.

Valid means eof() and bad() are both false. See stackoverflow. Com/questions/21647/… – Loki Astari Sep 23 '08 at 7:48.

There's an alternative approach to this: #include #include // ... copy(istream_iterator(iFile), istream_iterator(), ostream_iterator(cerr, "\n")).

I like this example, which for now, leaves out the check which you could add inside the while block: ifstream iFile("input. Txt"); // input. Txt has integers, one per line int x; while (iFile >> x) { cerr.

David McGraw: Make sure your text file doesn't have an extra carriage return after the last digit. This shouldn't matter, since the >> operator consumes whitespace.

Think that there is ablank after the last element in the file, yes..... I mean that the problem isn't in storing the data from the file , but the true that the poblem is when you inserted this data into the file. You can solve this proplem and store data in the file correctly by usig the function setw(num) where num is the number of spaces between each two element use this functon to seperate the data in the file instead of cout #include #include // the header file using namespace std; void main() { int x; ofstream outfile; outfile. Open("text.

Txt"); for(int i=0;i>x; cout.

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