VC + + Compiler Error "no appropriate default constructor available" solution

When inheriting a new class, there is no appropriate default constructor available this error,

Reason:

The constructor of the base class requires a parameter,
The derived class inherits from the base class, so the constructor of the derived class calls the base class's constructor (compiler-tuned) in advance.
Thus, the constructor of a derived class needs to pass a parameter to the constructor of the base class.

Workaround:

Pass a parameter to the base class in the constructor of the derived class.

Example

Class A

{

Public

A (int k);

};

Class B:public A

{

Public

B (int m): A (int k) {}

};