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The character '7' is not represented as 7 in ASCII.

EDIT: Too late.

Where is s pointing to? You just declare it as a char pointer, but never actually point it anywhere. Then you proceed to read in data to it. Strange stuff is bound to happen if not a segfault.

You probably won't be doing anything for a long time that will warrant a big IDE with lots of advanced features. Just use one of the gazillion text editors available and stick to the terminal for all...

lol

Check out this tutorial: http://beej.us/guide/bgnet/