[CentOS] make install?

Mon Jul 11 11:58:21 UTC 2011
hadi motamedi <motamedi24 at gmail.com>

Dear All
I downloaded the octave-3.4.2 and tried to install it on my centos 5.6
as the following:
#./configure
But it prompted for lack of a c compiler, so I tried to install gcc
first and then re-executed it and it was successful.
#make
But it prompts as "No targets specified and no makefile found".
#make install
But it prompts as "No rule to make target 'install'".
I had the same steps for installing applications when I was on my
centos 5.0 machine. Can you please let me know what is wrong my case?
Thank you