Question

I am making several calls to a function that initializes 2-d arrays of doubles. The first three calls are successful, but the fourth call fails. Code is:

double **scmass;
double **scdv;
double **dvmatches;
double **zpp;

…

scmass = init_d2darr(numrow,numcol);
scdv = init_d2darr(numrow,numcol);
dvmatches = init_d2darr(numrow,numcol);
zpp = init_d2darr(numrow,numcol);

…

double ** init_d2darr(int isize, int jsize) {
int m,n;
printf("in array initialize 1\n");
printf("isize: %i\njsize: %i\n",isize,jsize);
/* how many rows */
double **arr = (double **)malloc(sizeof(double *) * isize);
printf("after row initialization\n");
if (arr == NULL) {
    printf("malloc failed for arr in init_d2darr.\n");
    return NULL;
}
else {
    /* now how many cols */
    for (m=0; m<=isize; m++) {
        arr[m] = (double *)malloc(sizeof(double) * jsize);
        if (arr[m] == NULL) {
            printf("malloc failed for arr[%d] in init_d2darr.\n",m);
            return NULL;
        }
        else {
            /* initialize all to zero */
            for (n=0; n<jsize; n++) {
                arr[m][n] = 0;
            }
        }
    }
}
printf("in array initialize 2\n");
return arr;

Output looks like:

in array initialize 1
isize: 20
jsize: 21
after row initialization
in array initialize 2
in array initialize 1
isize: 20
jsize: 21
after row initialization
in array initialize 2
in array initialize 1
isize: 20
jsize: 21

The program actually runs all the way through when in debug mode, however, when I make a release executable and attempt to run it, the program crashes and I get the error “A problem caused the program to stop working correctly. Please close the program.” I’m on windows vista with Visual C++ 2008 Express Edition. Could anyone give me any advice? Thanks!

Jade

Edit: the declaration of the function (in a header file) is

double ** init_d2darr(int isize, int jsize);

Answer 1

In your outer for-loop:

for (m=0; m <= isize; m++) 

this should be:

for (m=0; m < isize; m++)