From: Nicolas Blais <nicblais AT hotmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Allegro matrix problem now is a djgpp prob
Date: Thu, 07 Oct 1999 22:26:44 GMT
Organization: Deja.com - Before you buy.
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To: djgpp AT delorie DOT com
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Well, now allegro doesn't crash anymore, it's DJGPP.
Here's the error symified:
Shutting down Allegro
Exiting due to signal SIGSEGV
Page fault at eip=00057ecd, error=0007
eax=000000b7 ebx=00057fe8 ecx=00000010 edx=7f678b89 esi=00057fe8
edi=002e9f58
ebp=00000fbc esp=00000fbc program=C:\DJGPP\PROJECTS\ILLIS\MAIN.EXE
cs: sel=00af  base=82e7c000  limit=fff4cfff
ds: sel=00b7  base=82e7c000  limit=fff4cfff
es: sel=00b7  base=82e7c000  limit=fff4cfff
fs: sel=00c7  base=00000000  limit=0010ffff
gs: sel=00c7  base=00000000  limit=0010ffff
ss: sel=029b  invalid
App stack: [00416000..00396000]  Exceptn stack: [000990e4..000971a4]

Call frame traceback EIPs:
  0x00057ecd   ___djgpp_exception_table+281

I have no idead what it means but here's my modified code that makes it
crash:
where RGB is actually defined as makecol15, res_x is 640 and res_y is
480 and ushort is unsigned short int.

PLEASE HELP.  If you do, I'm thankful//******START
.


ushort pix_x;
ushort pix_y;
ushort color_red;
unsigned int matrix[res_x][res_y] = {{0}};

for (unsigned int i = 0; i < (res_x * res_y); i++)
     {
     if (keypressed())
        break;
     pix_x = (rand() % res_x);
     pix_y = (rand() % res_y);
     if (matrix[pix_x][pix_y] == 1)
        continue;
     else
          matrix[pix_x][pix_y] = 1;
     color_red = (rand() % 255) + 1;
     putpixel(screen, pix_x, pix_y, RGB(color_red, 0, 0));
     }


--
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