Euphoria

I have implemented below program in c. While debugging its giving error on Open, Read commands as "identifier "open" not defined" and Error 5 error LNK2019: unresolved external symbol _mkfifo...

Need to test IOS application for 5 different languages. Please suggest if this can be done with "Instruments" tool.

Need answer for "Show that Byzantine agreement cannot be always be reached among four processors if two processors are faulty."