Could somebody please check how it converts the following program:

    #include <stdio.h>
    
    int main()
    {
        if (((unsigned char) 255) + ((unsigned char) 255) == 510) {
            puts("yes");
        } else {
            puts("no");
        }
    }

(The code outputs "yes", and it does not rely on undefined behavior.)

In other words, I doubt that proper “conversion”, with all the C semantics, is feasible.

Typecasts seem to trip it up, it replaces the check with

    if (unsigned char then 255) + ((unsigned char) 255) = 510 then  begin

I'm not particularly familiar with Delphi, but the issue here appears to be a combination of parenthetical grouping not being picked up and the program not knowing that "unsigned char" should become "byte".

Ex:

  unsigned char a = 255;
  unsigned char b = 255;
  if ((a + b) == 510) {
      puts("yes");
  }

becomes

  unsigned char a = 255;
  unsigned char b = 255;
  if a + b then = 510 then  begin 
    WriteLn('yes');
  end; 

instead of

  var a,b: byte;
  begin
      a := 255;
      b := 255;
      if (a + b) = 510 then begin
          writeln('yes');
      end;

It's also worth noting that assuming parenthetical grouping is fixed, the C code snippet should work fine; according to the online compiler I was toying around with, Pascal uses integer type promotion.

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