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Another newbie EXC_BAD_ACCESS in C
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Another newbie EXC_BAD_ACCESS in C


  • Subject: Another newbie EXC_BAD_ACCESS in C
  • From: "W. Thomas Leroux" <email@hidden>
  • Date: Fri, 13 Jan 2006 21:33:56 -0500

Hello all,

I'm trying my first foray into writing a (shell) program for OSX - it has been a *every* long time since I have looked at C, but here is what I have generated:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int main( int iArgc, char *pArgv[]) { char *da = "A"; char *db = "C"; char *dc = "G"; char *dd = "T"; char dna1 [100000] = {0}; int random; int iterations = 120000; int iterations1 = 2; //int iterations1 = 100000; int MAXVALUE = 3; // limit selection from 0 to 3. strcpy(dna1,"");

  int j  =  1;
  for (j = 0; j < iterations1; j++) {
//loop one

  int i  =  1;
  for (i = 0; i < iterations; i++) {
// fill 100000 character buffer loop
random = rand() % (MAXVALUE +1);

if(random == 1)
       strcat(dna1,da);
else if (random == 2)
       strcat(dna1,db);
else if (random == 3)
       strcat(dna1,dc);
else
       strcat(dna1,dd);
// printf ("%c%c%c%c", dna1, dna2, dna3, dna4);
  }
//write the buffer to the disk, then clear it
FILE *fp;
fp=fopen("//Users//wtl//Documents//dna3.txt", "a");
fprintf(fp, "%c", dna1);
fclose(fp);
clear(dna1);
	}
printf ("ALL DONE!");
return 0;
}


However, when I Build and Debug it, I get an EXC_BAD_ACCESS error - put no specific line error. I'm a bit befuddled, because it looks like the code should work, and I figured someone with a fresh eye would spot the issue faster than I can.


Thanks!

Thomas.


-- All about me! Me! Me! Me! http://www.wtl.technomages.net

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