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                            c++提供了關鍵字explicit，禁止通過構造函數進行的隱式轉換。聲明為explicit的構造函數不能在隱式轉換中使用。

[explicit注意]
* explicit用于修飾構造函數,防止隱式轉化。
* 是針對單參數的構造函數(或者除了第一個參數外其余參數都有默認值的多參構造)而言。
~~~
class MyString{
public:
    explicit MyString(int n){
        cout << "MyString(int n)!" << endl;
    }
    MyString(const char* str){
        cout << "MyString(const char* str)" << endl;
    }
};
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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