Mail Archives: djgpp/1998/07/20/09:47:02
| From: | Walter Luke <lukewa AT earlham DOT edu>
|
| Newsgroups: | comp.os.msdos.djgpp
|
| Subject: | Why does this code crash?
|
| Date: | Mon, 20 Jul 1998 08:33:31 -0400
|
| Organization: | infocom, inc.
|
| Lines: | 250
|
| Message-ID: | <35B3391A.227330DD@earlham.edu>
|
| Reply-To: | lukewa AT earlham DOT edu
|
| NNTP-Posting-Host: | dhcp-host509.cclab.earlham.edu
|
| Mime-Version: | 1.0
|
| To: | djgpp AT delorie DOT com
|
| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
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I apologize if the problem I'm having is simple--I'm new to C. The
following code generates a general protection fault and crashes the DOS
window. The error message reads, among other things, "Exiting due to
signal SIGSEGV". If someone could look over this and try to see where
the error is, it would be a big help...
--Walter
> #include "math.h"
> #include "stdio.h"
> #include "stdlib.h"
> #include "dos.h"
> #include "stdlib.h"
>
> int gene[500][9][2];
> int genes=2;
> int population=1;
> int totattributes=2;
> int genepool=0;
> int i, j, o, p, g, h;
> FILE *fp;
>
> main() {
>
> if ((fp = fopen("log.txt","w"))==NULL) {
> printf("cannot open file\n");
> exit(1);
> }
> //initializes genes
> for(i=1; i<=genes; i++) { //initializes non-conditional genes
> gene[i][2][1]=1;
> gene[i][7][1]=i;
> genepool++;
> }
>
> genepool++;
>
> for(i=1; i<=population; i++) { //initializes conditional genes
> gene[genepool][1][1]=i; //owning agent
> gene[genepool][2][1]=2; //marks it as a conditional
> for(j=1; j<=2; j++) {
> gene[genepool][3][1]=j; //agent vs agent's attributes stimulus
> if (j==2){
> for(o=1; o<=totattributes; p++){
> gene[genepool][4][1]=o;
> for (p=1; p<=population; p++){
> gene[genepool][5][1]=p;
> gene[genepool][6][1]=1;
> if (j==1) {
> for(g=1; g<=genes; g++){
> gene[genepool][7][1]=g;
> for(h=1; h<=genes; h++) {
> gene[genepool][8][1]=h;
> genepool++;
> }
> }
> }
> if (j==2) {
> for(g=1; g<=totattributes; g++) {
> gene[genepool][7][1]=g;
> for(h=1; h<=genes; h++) {
> gene[genepool][8][1]=h;
> genepool++;
> }
> }
> }
> }
> }
> }
> if (j==1){ //second one
>
> gene[genepool][4][1]=0;
> for (p=1; p<=population; p++){
> gene[genepool][5][1]=p;
> gene[genepool][6][1]=1;
> if (j==1) {
> for(g=1; g<=genes; g++){
> gene[genepool][7][1]=g;
> for(h=1; h<=genes; h++) {
> gene[genepool][8][1]=h;
> genepool++;
> }
> }
> }
> if (j==2) {
> for(g=1; g<=totattributes; g++) {
> gene[genepool][7][1]=g;
> for(h=1; h<=genes; h++) {
> gene[genepool][8][1]=h;
> genepool++;
> }
> }
> }
> }
>
> }
> }
> }
>
>
> for(i=1; i<=genepool; i++){
> for(j=1; j<=8; j++){
> fprintf(fp,"gene %d: {",i);
> fprintf(fp,"%d,", gene[i][j][1]);
> }
> fprintf(fp,"}");
> }
>
>
>
> fclose(fp);
>
>
> }
>
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Content-Type: text/html; charset=us-ascii
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<HTML>
I apologize if the problem I'm having is simple--I'm new to
C. The following code generates a general protection fault and crashes
the DOS window. The error message reads, among other things, "Exiting due
to signal SIGSEGV". If someone could look over this and try to see where
the error is, it would be a big help...
<P>
--Walter
<BR>
<BLOCKQUOTE TYPE=CITE>
<PRE>#include "math.h"
#include "stdio.h"
#include "stdlib.h"
#include "dos.h"
#include "stdlib.h"
int gene[500][9][2];
int genes=2;
int population=1;
int totattributes=2;
int genepool=0;
int i, j, o, p, g, h;
FILE *fp;
main() {
if ((fp = fopen("log.txt","w"))==NULL) {
printf("cannot open file\n");
exit(1);
}
//initializes genes
for(i=1; i<=genes; i++) { //initializes non-conditional genes
gene[i][2][1]=1;
gene[i][7][1]=i;
genepool++;
}
genepool++;
for(i=1; i<=population; i++) { //initializes conditional genes
gene[genepool][1][1]=i; //owning agent
gene[genepool][2][1]=2; //marks it as a conditional
for(j=1; j<=2; j++) {
gene[genepool][3][1]=j; //agent vs agent's attributes stimulus
if (j==2){
for(o=1; o<=totattributes; p++){
gene[genepool][4][1]=o;
for (p=1; p<=population; p++){
gene[genepool][5][1]=p;
gene[genepool][6][1]=1;
if (j==1) {
for(g=1; g<=genes; g++){
gene[genepool][7][1]=g;
for(h=1; h<=genes; h++) {
gene[genepool][8][1]=h;
genepool++;
}
}
}
if (j==2) {
for(g=1; g<=totattributes; g++) {
gene[genepool][7][1]=g;
for(h=1; h<=genes; h++) {
gene[genepool][8][1]=h;
genepool++;
}
}
}
}
}
}
if (j==1){ //second one
gene[genepool][4][1]=0;
for (p=1; p<=population; p++){
gene[genepool][5][1]=p;
gene[genepool][6][1]=1;
if (j==1) {
for(g=1; g<=genes; g++){
gene[genepool][7][1]=g;
for(h=1; h<=genes; h++) {
gene[genepool][8][1]=h;
genepool++;
}
}
}
if (j==2) {
for(g=1; g<=totattributes; g++) {
gene[genepool][7][1]=g;
for(h=1; h<=genes; h++) {
gene[genepool][8][1]=h;
genepool++;
}
}
}
}
}
}
}
for(i=1; i<=genepool; i++){
for(j=1; j<=8; j++){
fprintf(fp,"gene %d: {",i);
fprintf(fp,"%d,", gene[i][j][1]);
}
fprintf(fp,"}");
}
fclose(fp);
}</PRE>
</BLOCKQUOTE>
</HTML>
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