Class constant array Initialization

(1 ). move a [10] to the class level and change const int A [10] to static const int A [10]. You can think about it seriously. Since a [10] is a const, so do each object really need a separate a [10? Most of the time, the answer should be no. The class is defined as follows:

Class

{

Public:

A (){}

PRIVATE:

Static const int A [10];

};

Const int A: A [2] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}; // In the implementation file.

(2) Change the array to a pointer, that is, change const int A [10] to const int * const A. The class is defined as follows:

Const int Ca [10] = {, 5, 0}; // note

Class

{

Public:

A (): A (CA ){}

PRIVATE:

Const int * const;

};

 

(3) If you want to keep a copy of the constant array in each object, you can also use vector instead.
# Include <vector>
Using namespace STD;
//...
Const int Ca [5] = {1, 2, 3, 4, 5 };
Class
{
Public:
A (): A (Ca, Ca + 5 ){}
PRIVATE:
Const vector;
};

 

 

In view of these three methods, my friends who visit my blog also hope to discuss their respective advantages and disadvantages. Even if they leave a footprint, my blog keeps silence when so many people visit it every day, after reading so many posts, you have to go back to them.

 

I think the constant array members are the features of the class. Instead of the features of objects. So it should be declared as static. For this reason, I recommend the first method.

 

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