析构函数在C ++ [英] destructor in C++

问题描述

我在我的AB.h文件中有一个构造函数：

I had a constructor in my AB.h file:

class AB{
private: int i;
public:
AB:i(0){}//constructor
~AB:i(0){} // destructor
virtual void methodA(unsigned int value)=0;};

编译器说：

AB有虚拟函数，但非虚拟析构函数
AB.h：在析构函数'AB ::〜AB（）'：

AC.h：错误：只有构造函数base initializers

class AB has virtual functions but non-virtual destructor
AB.h: In destructor ‘AB::~AB()’:
AC.h: error: only constructors take base initializers

如果我使用〜AB（）;析构函数，它说我有虚拟函数，但我没有析构函数，我在哪里误解？
Thankyou

if I use the ~AB(); destructor, it said that i have virtual functions but i didn't have destructor, where did I misunderstand? Thankyou

推荐答案

您收到错误和无关的警告。

You're getting an error and an unrelated warning.

错误是因为您正在为析构函数使用初始值设置，这是没有意义的，且无效的语法。

The error is because you're using an initializer for your destructor, which doesn't make sense and isn't valid syntax.

您要：

~AB() { } // destructor

警告是因为您尚未声明您的析构函数虚拟。 使用虚拟方法的类应该具有虚拟析构函数：

The warning is because you haven't declared your destructor virtual. Classes with virtual methods should have virtual destructors:

virtual ~AB() { }

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