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Author Topic: convert from c to pascal vector of booleans  (Read 706 times)

mika

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convert from c to pascal vector of booleans
« on: November 26, 2022, 10:14:13 pm »
I have this code in c and want to convert it to Pascal
Code: Pascal  [Select][+][-]
  1. const std::vector<std::vector<bool>> Duplication1 =
  2. {
  3.                 { true, false }, // 2
  4.                 { true, true }, // 3
  5.                 { false, false, false }, // 4
  6.                 { false, false, true, false } // 5
  7. }
« Last Edit: November 27, 2022, 04:00:53 pm by mika »

marcov

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Re: covert from c to pascal vector of booleans
« Reply #1 on: November 26, 2022, 10:25:56 pm »
That code doesn't look like C at all, but like C++.


mika

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Re: covert from c to pascal vector of booleans
« Reply #2 on: November 26, 2022, 11:06:29 pm »
That code doesn't look like C at all, but like C++.
Exactly, i can't tell C and C++ apart. I need some help.

440bx

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Re: covert from c to pascal vector of booleans
« Reply #3 on: November 26, 2022, 11:24:19 pm »
Exactly, i can't tell C and C++ apart. I need some help.
if you intend to port C and C++ code to Pascal, you'll need at least a basic understanding of C and C++.

For a Pascal programmer, a very _basic_ understanding of C can be obtained in a few hours.  For C++ it's a different story.  Even a very basic understanding will probably require 3 to 4 days.

Pluralsight has a very good introduction to C++ given by Kate Gregory called "C++ fundamentals including C++ 17" and a follow up by the same author named "C++ beyond the basics".  An experienced programmer can go through both courses in about a day.  Of course, in one day, you won't be an expert but, you'll know enough to make sense of a fair amount of code.

HTH.
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ASerge

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Re: covert from c to pascal vector of booleans
« Reply #4 on: November 26, 2022, 11:38:43 pm »
I have this code in c and want to convert it to Pascal
Code: Pascal  [Select][+][-]
  1. {$APPTYPE CONSOLE}
  2. {$MODE OBJFPC}
  3.  
  4. type
  5.   TBoolVector = bitpacked record
  6.     b0, b1, b2, b3, b4, b5, b6, b7: Boolean;
  7.   end;
  8.  
  9. {$WARN 3177 off : Some fields coming after "$1" were not initialized}
  10. const
  11.   DuplicationV: array of TBoolVector = (
  12.     (b0:False; b1:True), // 2
  13.     (b0:True;  b1:True), // 3
  14.     (b0:False; b1:False; b2:True), // 4
  15.     (b0:True;  b1:False; b2:True; b3:False)); // 5
  16.  
  17. var
  18.   V: TBoolVector;
  19. begin
  20.   Writeln(SizeOf(V));
  21.   for V in DuplicationV do
  22.     Write(Byte(V), ' ');
  23.   Writeln;
  24.   Readln;
  25. end.

mika

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Re: covert from c to pascal vector of booleans
« Reply #5 on: November 26, 2022, 11:58:18 pm »
@ASerge, I like your suggestion, I will use it.

440bx

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Re: covert from c to pascal vector of booleans
« Reply #6 on: November 27, 2022, 12:05:11 am »
@Serge,

Any particular reason why you didn't use a bitpacked array of boolean, which is closer to a C++ vector of bool than a bitpacked record of booleans ?
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jamie

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Re: covert from c to pascal vector of booleans
« Reply #7 on: November 27, 2022, 12:26:06 am »
of course, the C++ is most likely relying on Template code so I would assume that maybe in the end if a working copy is going to happen then maybe some Generics is in order?
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mika

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Re: covert from c to pascal vector of booleans
« Reply #8 on: November 27, 2022, 12:57:57 am »
Any particular reason why you didn't use a bitpacked array of boolean, which is closer to a C++ vector of bool than a bitpacked record of booleans ?
It's all fine. I don't have to mimic internals structure of vector. Vector is used to build a tree. "true" for right branch, "false" for left branch. All program is only 400+ lines.

ASerge

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Re: covert from c to pascal vector of booleans
« Reply #9 on: November 27, 2022, 10:14:15 am »
Any particular reason why you didn't use a bitpacked array of boolean, which is closer to a C++ vector of bool than a bitpacked record of booleans ?
The record supports partial initialization, the array requires full.

dje

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Re: covert from c to pascal vector of booleans
« Reply #10 on: November 27, 2022, 11:01:43 am »
Code: Pascal  [Select][+][-]
  1. const
  2.  
  3.   Duplication1: array of array of boolean = (
  4.     (True, False), // 2
  5.     (True, True),  // 3
  6.     (False, False, False), // 4
  7.     (False, False, True, False) // 5
  8.     );  

ASerge

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Re: covert from c to pascal vector of booleans
« Reply #11 on: November 27, 2022, 11:28:24 am »
Code: Pascal  [Select][+][-]
  1. const
  2.  
  3.   Duplication1: array of array of boolean = (
  4.     (True, False), // 2
  5.     (True, True),  // 3
  6.     (False, False, False), // 4
  7.     (False, False, True, False) // 5
  8.     );  
Please provide the full program. It should print 2, 3, 4, 5 from this array.

440bx

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Re: covert from c to pascal vector of booleans
« Reply #12 on: November 27, 2022, 01:01:51 pm »
The record supports partial initialization, the array requires full.
Hadn't thought about that.  Thank you.
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mika

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Re: covert from c to pascal vector of booleans
« Reply #13 on: November 27, 2022, 04:05:41 pm »
Code: Pascal  [Select][+][-]
  1. const
  2.  
  3.   Duplication1: array of array of boolean = (
  4.     (True, False), // 2
  5.     (True, True),  // 3
  6.     (False, False, False), // 4
  7.     (False, False, True, False) // 5
  8.     );  
Please provide the full program. It should print 2, 3, 4, 5 from this array.
This is even better solution.
@ASerge Sorry, numbers in comments are misleading and have nothing to do with boolean values.
« Last Edit: November 27, 2022, 09:02:40 pm by mika »

Thaddy

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Re: convert from c to pascal vector of booleans
« Reply #14 on: November 27, 2022, 08:03:18 pm »
Alternatively you can simply use logic. e.g.
Code: Pascal  [Select][+][-]
  1. uses sysutils;
  2. var
  3.   m:cardinal = %00000000000000000;
  4. begin
  5.   m.setbit(1); // should print 2
  6.   writeln(m);
  7.   writeln (m.testbit(0)); // should print false;
  8. end.

It seems to me that a vector type is not warranted here. C++ programmers tend to make even more mistakes than Pascal programmers.
« Last Edit: November 27, 2022, 08:05:14 pm by Thaddy »
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