I would say that, because your computers are not on the internet, they have no IP address. No IP address because nobody (no DHCP server) was there for assigning IP address.
pls write out the procedure of, how share printer among two or three computers systems without connecting to the internet network, I tried it among two systems but what I saw is network limited to no connectivity, pls help me out. -question by victor
So, you simply have to manually assing an IP address.
Go to the network settings, choose "manually assign IP address", and choose a couple of IP, for instance 192.168.10.1 for the first computer and 192.168.10.2 for the second one.