[C + +] Oop

1. Const variables and references must be constructed when initialized.
2. const variables and references in a class must be initialized in the constructor.
3. A reference can be assigned multiple times, but a const variable cannot be repeated.
4. For const constants, once initialized, the call does not read memory and is directly generated directly from the symbol table in the code area.
5. Output from within-class reference: Add Endl as address output, no Endl as variable output

[C + +] Oop