Quick Question New Operator
Hi guys,
Been away from programming for a while.
I've read some info on the new operator and get the general jist.
Can someone tell me in laymans terms/baby language, what I get and what I can basically done and can do with a statement like:
Cheers!!Code:x = new double[2000]
After this assignment, you can index x from 0 to 1999.
Another way to put it is to say now you have 2000 doubles allocated in memory which must be deleted afterwards again with
Code:delete [] x;
Great. Simply put.
Thanks.
So how do I use x now? Just like an array??
e.g.)Code:x[0] = 1; x[1] = 2;
Yes.Originally Posted by strokebow
Since you are new to pointers, I think it would be a good idea to teach you about smart pointers:
std::shared_ptr<double> x = new double;
(Requires C++0x.)
Done. No need to delete.
For arrays, you can do
std::vector<double> x(2000);
Done. No need to delete.
You're allocating memory on the heap. The new operator allocates the amount of memory specified and returns a pointer to that memory.
