Purpose: to model a dfa (deterministic finite automaton) and use it to accept strings of the associated language. input: the program should take the dfa description from a text file that is specified as a command line parameter. if this parameter is missing, the user should be prompted for the data file. strings to be tested for inclusion in the language should be entered interactively by the user. output: for each string being tested, the program should indicate whether or not the string is accepted.