Is this a valid copy constructor?

这是一个有效的拷贝构造函数吗?。

Why does this code invoke the copy constructor?

为什么这段代码调用复制构造函数？

Which class definition is likely to need a copy constructor?

哪个类定义可能需要一个复制构造函数?

The idea is to create a protected copy constructor aside from the default constructor.

保护的想法是创建一个拷贝构造函数除了默认构造函数。

How to call to the copy constructor from the copy-assignment operator?

如何从复制赋值运算符调用复制构造函数？

Again, if you don't provide a copy constructor, the compiler generates one for you, again just copying the members using the copy constructor.

再一次，如果你不提供一个拷贝构造函数，编译器生成一个你，再一次复制使用拷贝构造函数成员。

Copy constructor is needed only in the case of dynamic memory allocation?

拷贝构造函数只在需要的情况下动态内存分配吗?。

If we do not define the copy constructor, the compiler synthesizes one for us.

如果没有定义复制构造函数, 编译器就为我们合成一个.

The compiler is eliding the call (actually, two calls) to the copy constructor.

编译器是省略调用（实际上，两与复制构造函数调用）。

As shown, our copy constructor and assignment operator use much of the same code.

可以看到，我们的拷贝构造函数和付值操作符使用了许多相同的代码。