Recursive grep question

Rowan Smith wrote:

> ps. it is not decending into any directories because no directories have
> a name that matches *.c. (The star is matched before grep even runs.)

That gave me the thought that I had to wildcard the directory name so I
tried:

grep -ir foobar ./*/*.c

That appears to have worked! I must try some of the other solutions for
my own education. Thanks to all.

Alan