calling shellscript from c

I wonder if there ir a way to call shellscript from a c program.
I want to use some comands like ls and grep and rm from my c program how can i do this?
(I know that for creating directories there is a mkdir function in C. Are there any likely functions in C, specially for removing files.)
Thanks in advance.

use system()

thanks cnu_sree.
now i know. ;)

Thanks for the valuable tip there dude! I never knew this function existed in Turbo C

remove(file_name) will erase a file.

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Originally Posted by cnu_sree

use system()

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That surely is an excellent command to start with. But as it invokes a new shell to execute a command, it may be slow to execute.
Instead you should functions from unistd.h

What about execl() and execlp() under unix