Because it does not have a destructor .

因为它没有一个析构函数。

We also need to add a destructor to the class.

我们还需要添加一个析构函数的类。

A call is made to a destructor of incorrect type.

对错误类型的析构函数进行了调用。

A destructor is called using an incorrect identifier.

使用错误的标识符调用析构函数.

If an exception occurs, the destructor cannot be called.

如果出现异常，则无法调用析构函数。

A base class almost always needs a destructor so that it can make the destructor virtual.

基类几乎总是需要构造函数,从而可以将析构函数设为虚函数.

Once a destructor is invoked for an object, the object no longer exists;

另外，对于第一句话，你难道不可以理解为是自动调用？

In the class destructor we will print out the final value of the counter.

在类的析构函数中我们将打印计数器变量的最终值.

Allows defining a destructor function that ru when an object is destroyed.

允许定义一个析构函数当对象崩溃的时候运行.

Allows defining a destructor function that runs when an object is destroyed.

允许定义一个析构函数当对像崩溃的时候运行.