#include <memory.h>

int* create_int_array(int len)
{
	return (int*)malloc(sizeof(int)*len);
}

void delete_array(int *arr)
{
	free(arr);
}

int main()
{
	int *ar = create_int_array(3);
	
	int i = 0;
	
	ar[i] = 123; printf("%d %d\n", i, ar[i++]);
	ar[i] = 456; printf("%d %d\n", i, ar[i++]);
	ar[i] = 789; printf("%d %d\n", i, ar[i++]);

	delete_array(ar);	

	return 0;
}

1 123
2 456
3 789