emm..... I would give you 75
out of 100 for your code.

The basic infrastructure was right, but there are two fatal errors.
1) A pipe can only be used to either read or write by a process, but not
both, otherwise, you would confuse the STREAMS(although it's not
gonna crash). so the parent process should have used the fd[1]
to write , and the child process should have used the fd[0] to read.

-15
2) It's very important that you close the other descriptor that you don't
need, otherwise you would never know when the other side closes
the connection, because you always have a connection open to
yourself, the read() function will return zero on a reading end of
pipe only when all connections to the writing end have been closed.
-10

I'm going to the picnic on Saturday, see you then...