432: Mainline

Next, the original program contains a for statement that does reading and writing:

for (limit = 0; cin >> radius >> length; ++limit) { 
  oil_tanks[limit].radius = radius; 
  oil_tanks[limit].length = length; 
} 

You need to add a statement that allocates new space for a cylinder object and deposits the address of the newly allocated space into the appropriate array location:

oil_tank_pointers[limit] = new cylinder; 

Also, you need to modify existing statements to dereference cylinder pointers:

oil_tank_pointers[limit] -> radius = radius; 
oil_tank_pointers[limit] -> length = length; 

The class-pointer operators appear in the assignment statements, because you are working with an array of cylinder pointers, rather than of cylinder objects.