Language Ccpp Cref Examples FUNC_POINT3.C

 
/************************************************************************
 *
 * Purpose: 1. Define a pointer to a function with parameters.
 *          2. Point at the function.
 *          3. Execute the function passing char and string parameters to it.
 *
 * Author:  M.J. Leslie
 *
 * Date:    04-Jun-95
 *
 ************************************************************************/

char * (*fpointer)(char *, char);	/* Define a pointer to a function	*/

char * prefix(char *, char);		/* Define a few functions.		*/
char * suffix(char *, char);

main()
   {
   fpointer =index.html prefix;		/* Put the address of 'add' in 'fpointer' */
   printf("%s ", fpointer("artin", 'M'));	

   fpointer = suffix;		/* Repeat for 'suffix'			*/
   printf("%s \n", fpointer("lesli", 'e'));
   }

/************************************************************************/

char * prefix(char *str, char c)
   {
   char result[100];
   
   result[0] = c;
   strcpy(result+1, str);

   return(result);
   }

/************************************************************************/

char * suffix(char *str, char c)
   {
   char result[100];
   int eol;

   strcpy(result, str);

   eol=strlen(result);
   result[eol] = c;
   result[eol+1] = '\0';

   return(result);
   }