dynamic 3D array memory alllocation

[andrewgoel]

can u plz giv a code in c for allocating a memory for 3D array.

[tyreld]

[code]

int ***3d_array;
int i;

3d_array = (int ***)malloc(sizeof(int **) * DEPTH_SIZE);

for (i = 0; i < DEPTH_SIZE; i++)

[tyreld]

Here is one way to do it. Keep in mind that this doesn't initialize any of the array to useful values, and that X_SIZE, Y_SIZE, and Z_SIZE are defined else where.

 
int ***3d_array;
int i, j;
 
3d_array = (int ***)malloc(sizeof(int **) * X_SIZE);
 
for (i = 0 ;  i < X_SIZE; i++) {
   3d_array[i] = (int **)malloc(sizeof(int *) * Y_SIZE);
 
   for (j = 0; j < Y_YSIZE; j++)
      3d_array[i][j] = (int *)malloc(sizeof(int) * Z_SIZE);
}
 
 

[tyreld]

The c99 standard also supports dynamic allocations using the standard array allocation scheme. If you have c99 compliant compiler the following should do the same thing simpler.

 
int 3d_array[X_SIZE][Y_SIZE][Z_SIZE];