From: Graham Watkins <Graham AT gingecat DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Incomprehensible messages when attempting to run program
Date: Thu, 1 Oct 1998 08:43:38 +0100
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Can anybody out there explain this?

I am currently attempting to learn C using the djgpp compiler. When
attempting to run the program below which has compiled without errors,
all I get is the following message:

====== contents of stderr from random.exe 3==========
 Exiting due to signal SIGSEGV
General Protection Fault at eip=00001662
eax=3cf26d88 ebx=74f605a0 ecx=OOOOea4O edx=74f61544 esi=00000054
edi=OOOOfaaO
ebp=0004fa74 esp=0004fa70 program=c:/djgpp/bin/random.exe cs: sel=0117
base=82d50000 limit=0005ffff
ds: sel=Ollf base=82d50000 limit=0005ffff es: sel=Ollf base=82d50000
limit=0005ffff fs: sel=OOc7 base=00014eb0 limit=DOOOffff gs: sel=012f
base=00000000 limit=ffffffff ss: sel=Ollf base=82d50000 limit=0005ffff
Call frame traceback EIPs: 0x00001662
0x00001cda

I have no idea what all this means, or whether it is a result of a
program fault, or due to my (limited) programming skills. If anybody
could tell me what I am doing wrong, I would appreciate it. 

The program:

/*RANDOM.C creates a multi-dimensional array*/

#include <stdio.h>
#include <stdlib.h>
/*Declare a random array with 1000 elements*/

int random_array[10][10][10];
int a, b, c;

main()
{
        /*Fill an array with random numbers. The C library*/
        /*function rand() returns a random number. Use one*/
        /*for loop for each array subscript.*/

        for (a = 0; a < 10; a++)
        {
                for (b = 0; b < 10; b++)
                {
                        for (c = 0; b < 10; c++)
                        {
                                random_array[a][b][c] = rand();
                        }
                }
        }

        /*Now display the array elements 10 at a time*/

        for (a = 0; a < 10; a++)
        {
                for (b = 0; b < 10; b++)
                {
                        for (c = 0; c < 10; c++)
                        {
                                printf("\nrandom_array[%d][%d][%d] = ",
a, b, c);
                                printf("\%d", random_array[a][b][c]);
                        }
                        printf("\nPress a key to continue, CTRL+C to
quit.");
                        getch();
                }

        }
}       /*End of main()*/
-- 
Graham Watkins

He who fights with monsters should look to it that he himself does not become a 
monster.  And when you gaze long into an abyss the abyss also gazes into you.

                                        F.Nietzche - 'Beyond Good and Evil'