@node strcmp, string
@subheading Syntax

@example
#include <string.h>

int strcmp(const char *s1, const char *s2);
@end example

@subheading Description

This function compares @var{s1} and @var{s2}.

@subheading Return Value

Zero if the strings are equal, a positive number if @var{s1} comes after
@var{s2} in the ASCII collating sequense, else a negative number. 

@subheading Portability

@portability ansi, posix

@subheading Example

@example
if (strcmp(arg, "-i") == 0)
  do_include();
@end example