Rename `main.c' to `baps1.c' to allow use of more implicit make rules.
To use it as it was intended put the following in your PS1 or PROMPT variable, depending on whether you use bash or zsh:
PS1
PROMPT
bash
zsh
PS1="\$(/path/to/baps1)"
Or, if you like single quotes, use:
PS1='$(/path/to/baps1)'