VMS Help CC, Run-time functions, strcmp  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Compares two ASCII character strings and returns a negative, 0, or
  positive integer, indicating that the ASCII values of the
  individual characters in the first string are less then, equal to,
  or greater than the values in the second string.

  Syntax:

       #include <string.h>

       int strcmp(const char *str_1, const char *str_2);