#printThere is nothing to force you to write a main programon each file; just as I supplied "getnum" on a separate file,you can put different routines on different files.  Writea function "length(s)" which if given a character array argument"s" returns the length of that string.Put this on a file named "length.c", and leavethe object file in "length.o".Write the main program fortesting this somewhere else.  Type "ready" when you have compiledand tested your program and are happy with it.#once #create RefThis file contains several lines of quite different lengths.You should getall of them exactlyrright.#once #create answer600141916#once #create tzaqc.cmain() {	char s[200];	while (gets(s))		printf("%d\n", length(s));}#usercc tzaqc.c length.c a.out <Ref >value#cmp value answer#succeed/*	 one way */length(s)char *s;{	int k;	for (k=0; s[k]; k++)		;	return(k);}#log#next19.1a 10