Why does the use of 'new' cause memory leaks?

Question

I learned C# first, and now I\'m starting with C++. As I understand, operator new in C++ is not similar to the one in C#.

Can you explain the reason of

Answer 1

If it makes it easier, think of computer memory as being like a hotel and programs are customers who hire rooms when they need them.

The way this hotel works is that you book a room and tell the porter when you are leaving.

If you program books a room and leaves without telling the porter the porter will think that the room is still is use and will not let anyone else use it. In this case there is a room leak.

If your program allocates memory and does not delete it (it merely stops using it) then the computer thinks that the memory is still in use and will not allow anyone else to use it. This is a memory leak.

This is not an exact analogy but it might help.