Hi
More information on you computer setup and capabilities would be required to answer the question, (i.e.: how are they placed, do they include Wi Fi capability, what connections and operating system etc)
I have included a link that explains how to network two computers together and share a single DSL connection; this will give you a good idea of what you will need for your system.

Bill
http://computer.howstuffworks.com/home-network.htm