empty c

Transferred from: http://blog.sina.com.cn/s/blog_93b45b0f01015s95.htmlWe often encounter these problems:(1) C + + defines an empty class, what is its size (sizeof)?(2) The size of a class that has only one char data member?(3) Can I define an empty

1, why the size of the class is not allowed in C + + is 0Class Zerosizet {}; Zerosizet Z[10];&z[i]-&z[j]; is usually obtained by dividing the number of bytes between two addresses by the type size, while the type size is 0 will be problematic2, why

[C ++ default function] The six class member functions generated by the empty class by default. The default Function1. default constructor.2. Default copy constructor.3. Default destructor.4. Default Value assignment operator. 5. default access

Visual C #, the next-generation mainstream programming language, is well known for its powerful language capabilities. And there is a very rich content of the program development package--. Net FrameWork SDK, as his backing. This makes Visual C # a

Introduction: In C #2.0, the void type is also introduced. The Void type is also the value type, but the void type includes the null value type, the following describes the specific support for the null type in C #2.0 (I have been thinking about how

C + + Primer Learning Notes _20_ class and Data Abstraction (6) _ Deep copy and shallow copy, empty class and empty array One, deep copy and shallow copyShallow copy: All variables of the copied object contain the same value as the original object,

This article mainly introduces string in C #. Empty and Null to explain the difference, this article also explains the difference between the empty string and empty and the difference between String.Empty and NULL, the need for friends can refer to

Today's interview is an interesting question: what is the amount of memory that an empty struct occupies in C + +? See the following code:#include struct s0{}; int Main () { sizeof S0 std::endl; return 0 ;}The interviewer alerted me on the

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String. Empty is equivalent to ""Typically used for initialization of stringsLike what:String A;Console.WriteLine (a);//error here, because there is no initialization of a And the following will not error:String a=string. Empty;Console.WriteLine (a);