[HOW TO] Retrieve random values from an array without retreiving the same twice - Page 6

Exolent[jNr]

The variable isn't increased at all, even after server_print() is called?

jim_yang

it did increased, but the expression take the value before it increased as the value
here is a small c test

Code:

#include "stdafx.h"
#include "stdlib.h"

int foo(int i)
{
	return i++;
}

int _tmain(int argc, _TCHAR* argv[])
{
	int i = 0;
	printf("%d\n", i++);
	printf("%d\n", i);
	printf("%d\n", foo(i));

	system("pause");
}

the result is
0
1
1

Exolent[jNr]

Quote:

Originally Posted by jim_yang

it did increased, but the expression take the value before it increased as the value
here is a small c test

Code:

#include "stdafx.h"
#include "stdlib.h"

int foo(int i)
{
	return i++;
}

int _tmain(int argc, _TCHAR* argv[])
{
	int i = 0;
	printf("%d\n", i++);
	printf("%d\n", i);
	printf("%d\n", foo(i));

	system("pause");
}

the result is
0
1
1

Yes, I understand pre/post increment differences.
When I initially asked my question, I meant that the variable wasn't being incremented at all, even after the printing.

jim_yang

really? if so, that's the bug from complier.

SnoW · *Last edited by SnoW; 08-05-2011 at 04:57.*

I remembered the increment was never done but at least now it seems it is done. I can verify a bug in compilers because at least the values the expression returns are rubbish. I would though not be surprised if this was already corrected in Compuphase.

Code:

new a[ 1 ];
    
for( new i; i < 10; i++ )
    server_print( "%i   %i", a[ 0 ]++, a[ 0 ] );

PHP Code:


			
0   1
822083584   2
3211264   3
12544   4
49   5
771751936   6
3014656   7
11776   8
46   9
805306368   10

jim_yang

really interesting stuff, I just have downloaded the newest version from pawn official site, same problem.

SnoW

Quote:

Originally Posted by jim_yang

really interesting stuff, I just have downloaded the newest version from pawn official site, same problem.

Then this is going to be fun, actually worthwhile.

xPaw

Someone should test the same on SourcePawn compiler.

**Bugsy** · *Last edited by Bugsy; 08-05-2011 at 13:02.*

I've noticed the same bug when using an incrementor operator, it only occurs for me when the incrementing (var++) is done as a param for string formatting. I don't remember if it only affects arrays as snow posted or if it also affects normal variables.

Exolent[jNr]

Quote:

Originally Posted by Bugsy

I've noticed the same bug when using an incrementor operator, it only occurs for me when the incrementing (var++) is done as a param for string formatting. I don't remember if it only affects arrays as snow posted or if it also affects normal variables.

Quote:

Originally Posted by Exolent[jNr]

It does the same thing with dynamic natives.

Code:

new count;

public plugin_natives( )
{
    register_native( "increase", "_increase" );
}

public _increase( )
{
    return count++;
}

That won't work properly.