unions

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UNION IN C (What will be the output)

union a { int x; char a[2]; } 开发者_高级运维If we assign 512 value to x and try to print a[0] and a[1] then what will be the output[详细]

2023-01-14 18:54 分类：问答
Templated << friend not working when in interrelationship with other templated union types

While working on my basic vector library, I\'ve been trying to use a nice syntax for swizzle-based printing. The problem occurs when attempting to print a swizzle of a different dimension than the vec[详细]

2023-01-12 04:18 分类：问答
polymorphism in c and buffers

I have this union: typedef union Message { message_basebase; message_with_parametersparameters; reply_messagereply;[详细]

2023-01-12 04:16 分类：问答
ANSI C unions - are they really useful?

From a response to some question yesterday, I learned that it is nonportable and unsafe to write into one union member and read the value from another member of a different type, assuming underlying a[详细]

2023-01-11 09:42 分类：问答
Union (or Concat, etc..) with Constant values and projection

I\'ve discovered a very nasty gotcha with Linq-to-sql, and i\'m not sure what the best solution is. If you take a simple L2S Union statement, and include L2S code in one side, and constants in the ot[详细]

2023-01-11 00:16 分类：问答
Advantages of using union when same thing can be done using struct - C

I have difficulty in understanding the use of union in C. I have read lot of posts here on SO about the subject. But none of them explains about why union is preferred when same thing can be achieved[详细]

2023-01-09 18:14 分类：问答
Accessing variables in a union inside a struct

Can anyone please explain why the 1st method of accessing a nested struct element inside an union in a struct works and the 2nd does not?[详细]

2023-01-07 08:27 分类：问答
sem_t union/struct C++ inherintance

I\'m porting some old C++ project on Linux (RHEL 5.3). The situation is the following #include <semaphore.h>[详细]

2023-01-04 20:23 分类：问答
member alignment in c struct-embedded union

I am modifying a bit of C code, that goes roughly like this: typedef structSTRUCT_FOO { ULONG FooInfo; union {[详细]

2023-01-04 11:01 分类：问答
c union and bitfields

Can bitfields b开发者_如何学编程e used in union?Yes, they can be. Why not? Bit-fields in unions behave in the same way they behave anywhere else. There\'s nothing special about bit-fields in unions (o[详细]

2023-01-04 10:11 分类：问答