Calloc a Two-Dimensional Array

Question

To make a two dimensional array, I\'m currently using the following:

int * own;

own = (int *)calloc(mem_size, sizeof(int));

for (i=0;i

        

Answer 1

Because own is declared as having type int *

int * own;

then own[i] is a scalar object of type int and you may not apply to it the subscript operator.

You could write the following way

int ( *own )[3] = calloc( mem_size, 3 * sizeof( int ) );

The other way is the following

int **own = malloc( mem_size * sizeof( int * ) );

for ( i = 0; i < mem_size; i++ ) own[i] = calloc( 3, sizeof( int ) );