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Prog to list ASCII codes (beginners' stuff)

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Prog to list ASCII codes (beginners' stuff)

 
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  #1
Sep 24th, 2004
Hi,

I just started a program containing every single prog we have done for school so far and added some private stuff.
Searching through my older files I found a prog which lists all Integers between 1 and 255 and their respective ASCII char, so I decided to include it into my 'collection'.

The problem is that 'twas a Win32 executable and we're working under DOS. Well actually this wouldn't be much of a problem, but the script seems no to work under DOS.

Well, first of here's the script:
C Syntax (Toggle Plain Text) 
  1.   	# include <iostream.h>
  2.    # include <conio.h>
  3.  
  4.    main()
  5.    {
  6.       int i, j, ip, ipp;
  7.       float k, l;
  8.       char zeichen;
  9.       for (i=1;i<=254;i++)
  10.       {
  11.           zeichen=i;
  12.           cout<<"\n"<<i<<" - "<<zeichen;
  13.           j=1;
  14.           for (j=1;j<=25;j++)
  15.           {
  16.                k=1.0*i/20;
  17.                l=1.0*j;
  18.                if (k==l)
  19.                {
  20.                     ip=i+1;
  21.                     ipp=i+20;
  22.                     if (i<=240) cout<<"\n\n(Press any key -->  "<<ip<<" to "<<ipp<<" )";
  23.                     getch();
  24.                     clrscr();
  25.                };
  26.            }
  27.         }
  28.         getch();
  29.    }

As I stated, no problems under Win32, but under DOS it stops at 26 and after pressing a key again the screen gets cleared again and stays black.

So my question is..is there any way to get something like this running under DOS?

I tried a simple "cin>>intvar; charvar=intvar; cout<<charvar;" aswell, but any value above 25 simply results in nothing being put out.

Well, thanks in advance.~
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #2
Sep 24th, 2004
Skip 26. Or better yet, skip printing everything non-printable.
C Syntax (Toggle Plain Text) 
  1.  #include <stdio.h>
  2.  #include <ctype.h>
  3.  
  4.  int main(void)
  5.  {
  6.     int i;
  7.     for ( i = 0; i < 256; ++i )
  8.     {
  9.  	  putchar(isprint(i) ? i : '.');
  10.  	  putchar(i % 16 == 15 ? '\n' : ' ');
  11.     }
  12.     return 0;
  13.  }
  14.  
  15.  /* my output
  16.  . . . . . . . . . . . . . . . .
  17.  . . . . . . . . . . . . . . . .
  18.    ! " # $ % & ' ( ) * + , - . /
  19.  0 1 2 3 4 5 6 7 8 9 : ; < = > ?
  20.  @ A B C D E F G H I J K L M N O
  21.  P Q R S T U V W X Y Z [ \ ] ^ _
  22.  ` a b c d e f g h i j k l m n o
  23.  p q r s t u v w x y z { | } ~ .
  24.  . . . . . . . . . . . . . . . .
  25.  . . . . . . . . . . . . . . . .
  26.  . . . . . . . . . . . . . . . .
  27.  . . . . . . . . . . . . . . . .
  28.  . . . . . . . . . . . . . . . .
  29.  . . . . . . . . . . . . . . . .
  30.  . . . . . . . . . . . . . . . .
  31.  . . . . . . . . . . . . . . . .
  32.  */
Last edited by Dave Sinkula; Sep 24th, 2004 at 6:45 pm. Reason: Added code.
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #3
Sep 24th, 2004
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Originally Posted by Dave Sinkula
Skip 26. Or better yet, skip printing everything non-printable.
Wow, thanks for the fast reply.

Well, but how to skip them most easily?

The first and more or less only thing that comes into my mind is like:

if ( i != 26 && i != anotherone && i != yetanotherone &&...
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #4
Sep 24th, 2004
[Oops. I see your reply beat my edit.]

I'd use isprint.

C Syntax (Toggle Plain Text) 
  1. #include <stdio.h>
  2.  #include <ctype.h>
  3.  
  4.  int main(void)
  5.  {
  6.     int i;
  7.     for ( i = 0; i < 128; ++i )
  8.     {
  9.  	  putchar(isprint(i) ? i : '.');
  10.  	  putchar(i % 32 == 31 ? '\n' : ' ');
  11.     }
  12.     return 0;
  13.  }
  14.  
  15.  /* my output
  16.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  17.    ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
  18.  @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _
  19.  ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ .
  20.  */
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #5
Sep 24th, 2004
I see, thanks again.

But seeing this...

The output under Win32 is like:
C Syntax (Toggle Plain Text) 
  1. 1   - ☺ 
  2. 2   - ☻ 
  3. 3   - ♥ 
  4. 4   - ♦
  5. 5   - ♣
  6. 6   - ♠
  7. 7   -
  8. 8   -
  9. 9   -
  10. 10  -
  11. 11  - ♂
  12. 12  - ♀
  13. 13  - 
  14. 14  - ♫
  15. 15  - ☼ 
  16. 16  - ► 
  17. 17  - ◄ 
  18. 18  - ↕
  19. 19  - ‼
  20. 20  - ¶
  21. 21  - §
And so on, so...

Aint I able to display the 255 ones of those under Dos?
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #6
Sep 24th, 2004
Check out http://www.asciitable.com/

The full list of ASCII characters are there. The function isprint() knows which of the characters are printable. isprint() returns a nonzero value if the input is a printable character, including the space character (0x20 – 0x7E). The other characters are either extended, or do other features which aren't print friendly.

More information on isprint()
isprint() is included in the ctype library, ctype.h:

int isprint(int c);
» This function returns nonzero if c is a space or a character for which either isalnum() or ispunct() returns nonzero.

int isalnum(int c);
» This function returns nonzero if c is any of or other locale-specific alphabetic character.
According to AsciiTable.com
Characters	ASCII
a thru z	97 thru 122
A thru Z	65 thru 90
0 thru 9	48 thru 57
int ispunct(int c);
» This function returns nonzero if c is any of the following or other implementation-defined punctuation character:
According to AsciiTable.com
Characters			ASCII
! " # $ % & ' ( ) * + , - . /	33 thru 47
: ; < = > ? @			58 thru 64
[ \ ] ^ _ '			91 thru 96
{ | } ~				123 thru 126

Hope this helps,
- Stack Overflow
Last edited by Stack Overflow; Sep 24th, 2004 at 8:15 pm. Reason: More detailed information
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #7
Sep 24th, 2004
Thanks, might be quite of use, though probably not directly in what I'm thinking of.

See the attachments, I just want the fourth attachment (Dos, page2) to be like the second one (W32, page2).
Attached Thumbnails
w32a.JPG   w32b.JPG   dosa.JPG   dosb.JPG  

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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #8
Sep 24th, 2004
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Originally Posted by Stack Overflow
Check out http://www.asciitable.com/

The full list of ASCII characters are there. The function isprint() knows which of the characters are printable. isprint() returns a nonzero value if the input is a printable character, including the space character (0x20 – 0x7E). The other characters are either extended, or do other features which aren't print friendly.

More information on isprint()
isprint() is included in the ctype library, ctype.h:

int isprint(int c);
» This function returns nonzero if c is a space or a character for which either isalnum() or ispunct() returns nonzero.

int isalnum(int c);
» This function returns nonzero if c is any of or other locale-specific alphabetic character.
According to AsciiTable.com
 Characters	ASCII
 a thru z	97 thru 122
 A thru Z	65 thru 90
 0 thru 9	48 thru 57
int ispunct(int c);
» This function returns nonzero if c is any of the following or other implementation-defined punctuation character:
According to AsciiTable.com
 Characters			ASCII
 ! " # $ % & ' ( ) * + , - . /	33 thru 47
 : ; < = > ? @			58 thru 64
 [ \ ] ^ _ '			91 thru 96
 { | } ~				123 thru 126

Hope this helps,
- Stack Overflow
The greater utility of functions like ispunct and isalnum are that they also work with other character sets, some of which, for example, do not necessarily have a contiguous alphabet or such. They are designed to work regardless of the particular implementation.
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #9
Sep 24th, 2004
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Originally Posted by Anu
See the attachments, I just want the fourth attachment (Dos, page2) to be like the second one (W32, page2).
DOS has a particular issue with the value 26. Apparently it is an end-of-file marker. So on a DOS system, it will not work the way you'd like. Thus my recommendation to skip it.
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Re: Prog to list ASCII codes (beginners' stuff)

 
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  #10
Sep 25th, 2004
That was all I actually wanted to know. Thanks once again. ^^
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