Write end of file c

Collectives on Stack Overflow. Learn more. Writing information at the end of a file in C Ask Question. Asked 7 years, 2 months ago. Active 7 years, 2 months ago. Viewed 3k times. I want to write some information to the end of a existing file in C. Improve this question. Luniam Luniam 5 5 silver badges 18 18 bronze badges. Add a comment.

Active Oldest Votes. By opening the file in append mode "a" you are placed at the end of the file. However the error in your code, is that you are not closing the file between open calls. Here the first argument denotes the filename which needs to be opened. The second argument denotes the mode in which the files needs to be opened.

We use ios:: which means input output streams. The mode are basically permissions, so r for read, w for write, a for append. You can also combine them, so rw would mean you could read and write to the file.

There are more modes, but these are the most commonly used. If this article was helpful, tweet it. Learn to code for free. Get started. I wrote the code below for that. Any comments? Last edited on Jan 10, at am UTC. Lines can be combined in to one line. Line Why continue? Line If the exercise says you should read integer numbers, why reading a string?

Last edited on Jan 11, at am UTC. Jan 11, at am UTC. That's greatttt, JLBorges! JLBorges, shouldn't line 14 be writing the new line to the file instead of std::cout? Your comment mentions adding to the file. Compile and test, it runs the same.