I need code examples for programs in C at least with 300 lines it doesn't have to be advance code the simpler the better. I need this program for my reverse engineering class. If you can tell me a where I can find this or if you can send me a program and don't mind that it would be use to reverse engineering as a learning example. Thanks a lot.

Reverse engineering is a taboo topic in the Edu community. I highly doubt you would be taking any class on it at a univeristy world wide. And under that thought, this post would violate the sites ToS for content related to Hacking/Cracking.

Well I guess you are misinformed and outdated because I am taking a class about it at my university at the Polytechnic University of Puerto Rico it is an elective in computer security. Reverse engineering has nothing to do with hacking or much less cracking and all I ask was for a small c source code to use as an example

It ain't as taboo as you think it is. At my Uni we have a course on Security and that course covers things like reverse engineering and cracking. In fact, most of the assignments are to perform some classic exploits. It's really quite important for white hats to know how black hats operate.

As for the original question, I suspect the professor wants everyone to write a simple but nontrivial program and then will distribute the binaries out and challenge the class to find out what each program is trying to accomplish. In that case, I recommend the OP to do something himself (300 lines is really not that big, at least for C). I personally think it's a fun to compete against your classmates (I don't like the cutthroat competition outside of class that some Unis suffer from, but controlled in-class competition is different).

Yes I know writing a 300 line c is easy but I have tests this week and very little time to sit down and code and since the professor authorize us to look for one on the internet I thought that I could save some time and use it to actually study

Grab anything from the kernel source-code libraries. A google search will produce any number of examples.