Input

Abstract

Up to now, we have looked at some simple programs that take values which have been set in the source code, manipulated these values and printed the results of these manipulations. You have to agree that while what we have learned so far is important, it is rather limited. In order to write any particularly useful programs, the programmer would need to know all the values the program needs in advance. This is hardly ever the case, and it is far better from the user’s point of view if the program can receive values at the time it is run, rather than the time it is compiled.