运行时错误需要“;”吗？

发布于 2024-12-15 09:12:06 字数 311 浏览 2 评论 0原文

我试图使用继承来创建一个从 runtime_error 派生的类，但我不断收到错误，即使这是练习中使用的确切代码以及本书中的示例。这是代码：

class DivideZeroEx : public runtime_error
{
    public:
        DivideZeroEx()
            runtime_error( " attempt to divide by zero" )
};

现在我收到一个错误，指出它需要一个 ;在runtime_error(“尝试除以零”)行之前。

原文

I am trying to use inheritance to create a class derived from runtime_error, but I keep getting an error even though this is the exact code used in exercises and as an example from the book. Here is the code:

class DivideZeroEx : public runtime_error
{
    public:
        DivideZeroEx()
            runtime_error( " attempt to divide by zero" )
};

Now I get an error stating that it expects a ; before the runtime_error("attempt to divide by zero") line.

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就像说晚安 2024-12-22 09:12:06

调用基类构造函数的语法应该是：

DivideZeroEx() : runtime_error( " attempt to divide by zero" ) { }

The syntax for calling your base class constructor should be:

DivideZeroEx() : runtime_error( " attempt to divide by zero" ) { }

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夏日落 2024-12-22 09:12:06

您正在尝试调用成员初始值设定项列表中的基类构造函数，语法为：

DivideZeroEx():runtime_error( " attempt to divide by zero" )
{
}

You are trying to call the Base class constructor in Member Initializer List, the syntax is:

DivideZeroEx():runtime_error( " attempt to divide by zero" )
{
}

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九局 2024-12-22 09:12:06

class DivideZeroEx : public runtime_error
{ 
public: 
   DivideZeroEx() : runtime_error( " attempt to divide by zero" ) 
   {
   }

};

class DivideZeroEx : public runtime_error
{ 
public: 
   DivideZeroEx() : runtime_error( " attempt to divide by zero" ) 
   {
   }

};

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云朵有点甜 2024-12-22 09:12:06

在这种情况下，它并没有节省太多，但是如果您要在整个类中按名称使用 runtime_error ，那么将来更换基类会更容易。

class DivideZeroEx : public runtime_error
{ 
typedef runtime_error base;

public: 
   DivideZeroEx() : base( " attempt to divide by zero" ) 
   {
   }
};

In this instance it doesn't save much, but if you were to use runtime_error by name throughout your class, this is much easier to swap out the base in the future.

class DivideZeroEx : public runtime_error
{ 
typedef runtime_error base;

public: 
   DivideZeroEx() : base( " attempt to divide by zero" ) 
   {
   }
};

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~没有更多了~