Question

Just started to learn C language.
I have a pointer array int *parr and I need to fill it with random numbers and then do some other things with it.
But I even don’t understand how to fill it with random numbers. I tried something like this, but it hangs the program:

for(i=0 ; i<R ; i++)
{
  for(j=0 ; j<C; j++)
    {
    *(parr+i*C+j)=rand() % 10;
    printf("%d",*(parr+i*C+j));
    }
  printf("\n");
}

Answer 1

The way you initialize it, you probably have to malloc memory like this:

parr = malloc(R * C * sizeof(*parr));