我怎麼能初始化一個巨大的靜態類在C++

Question

我header.h

Class A 
{ 
int var_1; 
int var_2; 
}; 
Class b 
{ 
private: static A var[MAX]; 
..... 
}; 

但我怎麼能初始化header.cpp這個屬性？

Answer 1

給出一個默認構造函數，將int設置爲0或其他值。

A b::var[MAX] = {};

Answer 2

假設有class A與公共構造不帶任何參數（或默認構造函數）：

文件BH：

#include "a.h" 

// global constant: 
const int MAX = 10; 

class B { 
private: 
    static A var[MAX]; // declaration 
}; 

文件b.cpp：

#include "b.h" 

A B::var[MAX] = {};  // definition 

Answer 3

在實現文件：

A b::var[] = {}; // static member definition 
       // A() is called for each member so you might want 
       // to implement it 

例如：

#define MAX 10 

class A 
{ 
    int var_1; 
    int var_2; 
}; 
class b 
{ 
private: 
    static A var[MAX]; // static member declaration 
}; 

A b::var[] = {};   // static member definition 

int main() { 
    return 0; 
} 

http://ideone.com/ndkPmX