Review sun Xin VC ++: constructor and destructor.

1. A class can have only one destructor and cannot contain any parameters.

2. The system adds a constructor without parameters for a class without constructor. However, when you add a constructor, the system does not add it.

3. First execute the constructor of the parent class, and then execute the constructor of the Child class. The opposite is true for destructor.

4. If the constructor parameters of the parent class and subclass are inconsistent, use the following method:

Class fish: Public animal {public: fish (string name): Animal (name, 100 ){}}

5. constants are initialized in the constructor.

Const int weight; fish (string name): m_weight (100 ){}