Thread: array problem.

Dear All

I have the following code which gives a segmentation fault. I dont think the array size is too large to result in a segmentation fault.

int xdim = 36;
int ydim = 256;
int zdim = 256;

double ***something = (double ***)malloc(xdim * sizeof(double **));
for(i=0; i< xdim; i++)
something[i] = (double **)malloc(ydim * sizeof(double *));

for(j=0; j< ydim; j++)
something[i][j] = (double *)malloc(zdim * sizeof(double));

for(i=0; i< xdim; i++)
for(j=0; j< ydim; j++)
for(k=0; k< zdim; k++)
something[i][j][k] = 1.0;


Thanks in advance,
Prasad.

My apologises for not adding the code tags.

I added the allocation check to make no difference. I still get the sedmentation fault and not the memory allocation failure message. The full code is here.

Code:

int xdim = 36;
int ydim = 256;
int zdim = 256;

double ***something = (double ***)malloc(xdim * sizeof(double **));
for(i=0; i< xdim; i++)
something[i] = (double **)malloc(ydim * sizeof(double *));

for(j=0; j< ydim; j++)
something[i][j] = (double *)malloc(zdim * sizeof(double));

if(something == NULL)
{
printf("Couldnt allocate memory");
exit(0);
}

for(i=0; i< xdim; i++)
for(j=0; j< ydim; j++)
for(k=0; k< zdim; k++)
something[i][j][k] = 1.0;

Thank you for your reply.
Cheers,
prasad.

Thank you for your reply...I solved the problem.

Code:

for(i=0; i< xdim; i++)
something[i] = (double **)malloc(ydim * sizeof(double *));

for(j=0; j< ydim; j++)
something[i][j] = (double *)malloc(zdim * sizeof(double));

should be

Code:

for(i=0; i< xdim; i++)
something[i] = (double **)malloc(ydim * sizeof(double *));

for(i=0; i< xdim; i++)
for(j=0; j< ydim; j++)
something[i][j] = (double *)malloc(zdim * sizeof(double));

Thank you for your help.

Cheers,
Prasad..

thank you both for your assistance.