
92 ◾ Cyber-Physical Systems
Also, these relationships also have the corresponding inherit relationship in both the compiled
C++ part and OTcl interpreted part of the sharing area. Why does NS choose two languages?
One task is about implementing the components and functions in the lower level by one kind of
system programming language. is type of language needs to efficiently control the data bytes
and packet header and operate the algorithm with a large data set. For such a task, the running
speed is important. On the other hand, the time for changes (run the simulation, find errors,
modify the errors, recompile, and multiple time running) is ...