deleting a multi-dimensional array

[miriza]

Hi!

I am having problem deleting a multi-dimensional array. I get the following error message: glibc detected ***double free or corruption (out). The program is below. I am following the steps in FAQ-Lite at: http://www.parashift.com/c++-faq-lit...tore-mgmt.html

void myarray (int sta1) {
  double **sta_dist = new double*[sta1];
  for (int = 0; i < sta1; i++) {
    sta_dist[i] = new double [sta1];
    for (int j=0; j < sta1; j++) {
      sta_dist[i][j] = 0.0;
    }
  }
 
  if (sta_dist) {
    for (int i = sta1; i > 0; --i) {
      delete [] sta_dist[i-1];
    }
   delete [] sta_dist;
  }
}

[weaknessforcats]

if (sta_dist) {
for (int i = sta1; i > 0; --i) {
delete [] sta_dist[i-1];
}
delete [] sta_dist;
}
}

This doesn't look right. You need to delete from 0 through sta1:

if (sta_dist) {
    for (int i = 0; i < sta1; ++i) {
      delete [] sta_dist[i];
    }
   delete [] sta_dist;
  }
}