在C ++中使用类 [英] using classes in C++

问题描述

在c#中，我将类用作
class1 c = new class1("contractor val");
在C ++中我怎么看?
thnx寻求帮助

in c# im use class as
class1 c=new class1("contractor val");
in c++ how i that ?
thnx for any help

推荐答案

在C#中，所有类都使用引用语义.类实例始终使用堆来存储数据.值类型-结构，原始类型和枚举-始终使用值语义.它们使用标记为静态"的静态内存或声明为局部变量的堆栈内存.

相反，C ++类使您可以选择值或引用语义.

为了参考语义和使用堆，可以像在示例中一样使用关键字new声明变量.

另外，您可以创建一个这样的实例:

In C#, all classes use reference semantics; and class instances always use heap to store data. Value type -- structures, primitive types and enums -- always use value semantic. They use either static memory is marked "static" or stack memory if declared as local variables.

In contrast, C++ classes give you a choice of value or reference semantic.

For reference semantic and use of heap, you declare variables like you do in your example using keyword new.

Alternatively, you create an instance like this:

class1 c("my string");

在这种情况下，将使用值语义.

使用C ++，您还可以将自己的内存分配方法与类一起使用.为此，您可以提供自定义的运算符new和delete:

In this case, value semantics is used.

With C++ you can also use your own memory allocation methods with classes. To do this, you can provide customized operators new and delete:

class Myclass
{
public:
        void* operator new(size_t);
        void operator delete(void*);
};

有关更多详细信息，请参见:

http://oopweb.com/CPP/Documents/CPPHOWTO/Volume/C ++ Programming-HOWTO-9.html [ http://www.cprogramming.com/tutorial/operator_new.html [

For futher detail please see:

http://oopweb.com/CPP/Documents/CPPHOWTO/Volume/C++Programming-HOWTO-9.html[^]

http://www.cprogramming.com/tutorial/operator_new.html[^]

or google for similar manuals -- there are a lot.

Thank you.

Happy New Year!

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