Question: Variable-length arguments. Write a function called printf(). There is one positional argument, a format string. The rest are variable arguments that need to be displayed to standard output based on the values in the format string, which allows the special string format operator directives such as %d, %f, etc. HINT: the solution is trivial-there is no need to implement the string operator functionality, but you do need to use the string format operator ( % ) explicitly.