My Ubuntu version is 12.04 LTS. I have written some C programs. But there is a compiler-problem. I've googled and found that I need build-essential. So I download and installed it.
After installation, it worked well. But after maybe 3 hours, the problem happened again.
When I write:
gcc -o -std=c99 sort sort.c
The compiler complains:
gcc: error: sort: No such file or directory.
I have no idea now.