77. Byte Buffer Indexing

Create a class ByteBuffer that stores an array of exactly 8 bytes using uint8_t and allows indexed access using an overloaded operator[].

The class must support:

• Writing to a specific byte

  buffer[i] = value;
  

• Reading a specific byte

  x = buffer[i];
  

The overloaded operator must return a reference so that assignments work correctly.

Program Behavior:

1. Read 8 integer values to initialize the buffer
2. Read an index idx and a value v
3. Assign the new value using the overloaded operator
4. Print all 8 bytes separated by spaces

Numeric Rules (Explicit):

• All stored values are uint8_t
• Input values will be in the range 0 to 255 inclusive
• No overflow, saturation, or wraparound handling is required
• Index will always be between 0 and 7

Example Input:

1 2 3 4 5 6 7 8
3 99

Example Output:

1 2 3 99 5 6 7 8

Constraints:

• Use uint8_t internally to store exactly 8 bytes
• operator[] must return a reference
• Index range is guaranteed valid (0–7)
• Value range is guaranteed valid (0–255)