scores=(int*)malloc(sizeof(int)*num); 
/*size of returns thesize of an int and multiply's it by 
the number of ints aka num,(num=4 in this case), then 
malloc allocates the specified amount of memory. In this 
case, it will take 4 bytes times 4 bytes giving 16 bytes, 
which is just enough to store 4 integers.*/ 
*(scores+0) 
/*dereferences what's at the scores address and if you add 
you can dereference the things at the address shifted up 
from the starting adress.*/