124. Driver Owns Buffer

In embedded systems, a driver often owns internal buffers that must exist only while the driver exists.
When the driver shuts down, all owned resources must be released in a deterministic order.

Your task is to model this using composition and observe the construction and destruction order.

Do This:

• Create a Buffer class that stores one integer
• Create a Driver class that owns a Buffer
• Read one integer from input
• Store it in the buffer via the driver
• Print the stored value
• Observe destruction when the driver goes out of scope

Program Flow:

1. Read one integer
2. Create a Driver inside a local scope
3. Driver stores the value in its internal buffer
4. Driver prints the stored value
5. Scope ends
6. Driver shuts down
7. Buffer is destroyed automatically

Input:

One signed integer

Output (exact order, each on its own line):

Buffer created
Driver initialized
Stored value: <value>
Driver destroyed
Buffer destroyed

Constraints:

• Buffer must not be created in main()
• Buffer access only through Driver
• No dynamic allocation
• No inheritance
• Must support full signed int range
• Output format must match exactly