strcmp

   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 than, equal
   to, or greater than the values in the second string.

   Format

     #include  <string.h>

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

Additional information available:

Arguments       Description     Return_Values