keyword.c

C和指针源程序 C和指针源程序C和指针源程序C和指针源程序

/*
** Determine whether the argument matches any of the words in
** a list of keywords, and return the index to the one it matches.
** If no match is found, return the value -1.
*/

#include <string.h>

int
lookup_keyword( char const * const desired_word,
    char const *keyword_table[], int const size )
{
	char	const **kwp;

	/*
	** For each word in the table ...
	*/
	for( kwp = keyword_table; kwp < keyword_table + size; kwp++ )
		/*
		** If this word matches the one we're looking for,
		** return its position in the table.
		*/
		if( strcmp( desired_word, *kwp ) == 0 )
			return kwp - keyword_table;

	/*
	** Not found.
	*/
	return -1;
}