int_wrap.c


  /************************************************* ***************** 
   int_wrap.c - k4thryn akelei 

   demonstratie van beperkingen op integer data types. 
   Dit programma heeft de volgende opties voor ondertekend of niet-ondertekende argumenten, zodat  
   de verschillen in gedrag kan worden gezien. 

   goede opties (over compilers w / a 2-bit short) zijn  

	  -s 32767 
	  -u 65535 
  ************************************************** *****************/ 

  # include <stdio.h> 
  # include <stdlib.h> 
  # include <string.h> 

  void usage (char *); 

  int main (int argc, char * argv []) ( 

	  unsigned korte unsigned_number; 
	  korte signed_number; 


	  if (argc! = 3) ( 
		  usage (argv [0]); 
		  return 1; 
	  ) 

	  if (strncmp (argv [1], "-u", 2) == 0) ( 
		  printf ( "grootte in bytes:% d \ narg:% s \ n", sizeof (unsigned_number), argv [2]); 
		  sscanf (argv [2], "% hu", & unsigned_number); 
		  printf ( "\ nunsigned waarde:% hu \ n", unsigned_number); 
		  printf ( "waarde + 1:% hu \ n" + + unsigned_number); 
	  ) 
	  anders als (strncmp (argv [1], "-s", 2) == 0) ( 
		  printf ( "grootte in bytes:% d \ narg:% s \ n", sizeof (signed_number), argv [2]); 
		  sscanf (argv [2], "% hd", & signed_number); 
		  printf ( "\ nsigned waarde:% hd \ n", signed_number); 
		  printf ( "waarde + 1:% hd \ n" + + signed_number); 
	  ) 
	  else ( 
		  usage (argv [0]); 
		  return 1; 
	  ) 

	  return 0; 
  ) 

  void usage (char * bin) ( 
	  fprintf (stderr, "Usage: \ t% s - [su] n \ n", BIN); 
	  fprintf (stderr, "\ twhere-s geeft ondertekend,-u geeft unsigned, en N is een integer \ n 
	  terugkeer;