To: "Michael T. Smith" <aa529 AT cfn DOT cs DOT dal DOT ca>
Subject: Re: More of my stupid programming mistakes?
From: pfulmek AT email DOT tuwien DOT ac DOT at (Paul FULMEK)
Reply-To: pfulmek AT email DOT tuwien DOT ac DOT at
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Date: Tue, 23 Aug 1994 10:21:48 +0000


>>>Return-Path: <djgpp-bounces AT sun DOT soe DOT clarkson DOT edu>
>>>Return-Path: <aa529 AT cfn DOT cs DOT dal DOT ca>
>>>Date: Mon, 22 Aug 1994 21:03:16 -0300
>>>From: "Michael T. Smith" <aa529 AT cfn DOT cs DOT dal DOT ca>
>>>Reply-To: "Michael T. Smith" <aa529 AT cfn DOT cs DOT dal DOT ca>
>>>Subject: More of my stupid programming mistakes?
>>>To: djgpp AT sun DOT soe DOT clarkson DOT edu
>>>Mime-Version: 1.0
>>>Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
>>>
>>>I have been having more trouble with my conversion program. This time I 
>>>am almost done and have just a few (but still major) errors to clear up. 
>>>There are two of them:
>>>
>>>1. Converting from Binary to hex, decimal and octal doesn't work for me. 
>>>If I enter a relatively small number like 111000, it converts it to 
>>>"111000 Dec", "111000 Octal" and "111000 Hex" (or something along those 
>>>lines). If I enter any binary number that is much larger, it always 
>>>converts it to something like "4267267 Dec", "377777777 Octal" and 
>>>"FFFFFF Hex". It must be something to do with strtoul, which I don't have 
>>>quite figured out.
>>>
>>>2. The Conversion Table, listing Oct, Dec and Hex equivalents to 255 Dec, 
>>>doesn't work right. The Hex numbers are right, but the others are wrong:
>>>Oct Dec Hex
>>>-----------
>>>73170 334848 0
>>>73170 334848 1
>>>73170 334848 2 etc.
>>>
>>>I have included the functions in question. Any help for this clueless 
>>>newbie would be appreciated (why am I having so much trouble with C???!!! 
>>>I know that there are supposed to be errors, but this seems to be an 
>>>all-out attack!).
>>>
>>>/* convtable() gives a listing of equivved Bin/Hex/Dec/Oct numbers. */
>>>/* SUN//14/08/1994//1629+ */
>>>/* Originally, I was going to put in Binary numbers too, but that would
>>>   take far too long, because I wouldn't be able to do a nice quick loop.
>>>*/
>>>
>>>void convtable(void)
>>>{
>>>  unsigned int convindex;
>>>  char hitkey[3];
>>>  FILE *toprn;
>>>  
>>>  fpurge(stdout);
>>>  ScreenClear();
>>>
>>>  printf("Please turn PRN on and on-line, and then press ENTER...");
>>>  fpurge(stdin);
>>>  gets(hitkey);
>>>  toprn = fopen("PRN","w");
>>>  ScreenClear();
>>>  fprintf(toprn, "Octal/Decimal/Hexadecimal Equivalents\n");
>>>  fprintf(toprn, "Oct Dec Hex\n");
>>>  fprintf(toprn, "-----------\n");
>>>  
>>>  for(convindex = 0; convindex <= 255; convindex++)
>>>  {
>>>    fprintf(toprn, "%o %u %X\n");
>>>  }
>>>}
>>>
>>>/* binconv() is Binary to All conversion. It is not with the rest of the
>>>   "connies" because it is a fairly late addition, 08/08/1994
>>>*/
>>>/* MON//08/08/1994//2030+ */
>>>
>>>void binconv(void)
>>>{
>>>  char binary[33];
>>>  char hitkey[3];
>>>  char *other; /* I don't completely understand strtoul(), so I don't
>>>                 know what this should be called!
>>>              */
>>>  
>>>  fpurge(stdout);
>>>  ScreenClear();
>>>  printf("\nEnter unsigned binary number (up to 32 bits long): ");
>>>  fpurge(stdin);
>>>  gets(binary);
>>>  printf("\n\n%s Bin = \n\n", binary);
>>>  printf("%lu Dec\n", strtoul(binary, &other, 10));
>>>  printf("%lX Hex\n", strtoul(binary, &other, 16));
>>>  printf("%lo Oct\n", strtoul(binary, &other, 8));
>>>  printf("\nPress ENTER to continue...");
>>>  fpurge(stdin);
>>>  gets(hitkey);
>>>}
>>>
>>>
>>>****************************************************************
>>>* Michael Smith       * Dartmouth, NS (Canada)                 *
>>>* aa529 AT cfn DOT cs DOT dal DOT ca * Chebucto FreeNet (902)494-8006         *
>>>****************************************************************
>>>* Words of Wisdom:                                             *
>>>* Beware of programmers carrying screwdrivers.                 *
>>>* MACINTOSH: Machine Always Crashes If Not The OS Hangs        *
>>>****************************************************************
>>>
>>>
>>>


--

Technische Universitaet Wien
Institut fuer Werkstoffe der Elektrotechnik
Dipl.-Ing. Paul FULMEK
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