strtok( [target,] delimiters [, /skip_final_delim])
This function finds the next token in an installed string and returns
it. The returned token consists of the next set of characters, if any,
that are not in string
delimiters; or (if no such characters
remain in the installed string and if also
not been chosen) of the remainder of the installed string (which
consists only of characters that are in
delimiters); or (if
no characters at all remain) an empty string.
a new target string is installed (in the place of any older one) through
target. Each next call to
target returns the next token from the last installed string.
Neither of the arguments is modified by calls to
delimiter may have different values from call to call.