How to find out how much memory the new operator allocated? Must be 200 bytes

Question

https://code.sololearn.com/ciBC02Z1YjVl/?ref=app

Answer 1

Find it out by using the sizeof operator and run. Different device gives different result so yeah, I can only find out using the sizeof

Answer 2

You don't. You have to keep track of this yourself.
It is implementation defined where the compiler stores that information for the delete call.
Unless the new call throws a bad_alloc exception and/or returns a nullptr you can be sure that it allocated at least the space you requested.

Answer 3

I'm not sure what the question was...

Answer 4

UraL I understand now.

Answer 5

UraL I think the only way is using 50*sizeof(*a) so the programmer has to keep track of the size of memory dynamically allocated in C.

Answer 6

👑Miss Solollearn Philippines (Storm Me) sizeof is not applicable in this case. give an example

Answer 7

Dennis ok

Answer 8

Sonic why? The question is concrete

Answer 9

use "sizeof()" function

Answer 10

Sumiya do it and show result:-)

Answer 11

Sumiya read above