pack c

Pack is a struct, union, and class member alignment to specify the byte boundary. different from the/ZP switch of the compilation option (property> Configuration property> C/C ++> code generation> structure member alignment), it is not applicable to

Transferred from: https://www.cnblogs.com/ransn/p/5081198.htmlFirst, the conceptAlignment is related to the location of the data in memory. If the memory address of a variable is exactly the integer multiple of its length, he is called natural

Reprint Address: http://blog.csdn.net/21aspnet/article/details/6729724First, the conceptAlignment is related to the location of the data in memory. If the memory address of a variable is exactly the integer multiple of its length, he is called

refer to a set of function pack,unpack before looking at the following example. Any language with socket operation has a function dedicated to the package, PHP is no exception of course this set of functions is not just a package.Here's a quick

C + + compiler instruction #pragma pack pairing use #pragma pack can be used to specify the value of the memory alignment of a member variable of a C + + data structure (optional value is 1,2,4,8,16). This article focuses on the use of pack

1 introIn the program, sometimes when we define the structure, we use #pragma pack (push,1) & #pragma pack (POP) similar code to wrap the structure together.The general form is as follows:#pragma pack (push,1);struct A{} ；#pragma pack (POP);What is

This is the parameter setting for the compiler, for the structure byte alignment setting, #pragma pack is the alignment of the specified data in memory. #pragma pack (n) Action: The C compiler will be aligned by N bytes.#pragma pack () Effect:

Pack and unpack are not really easy to see in normal programs, but if you use PHP from a long time ago to generate Excel you will know. The head of his Excel is the pack. Recently, when I tried to interact with C, I used this thing again, so I had

#pragma pack (4)//4-byte aligned, but in fact the maximum number of bytes consumed by a single member in a struct is 2 bytes, so it is actually aligned by 2 bytestypedef struct{Char buf[3];Word A;}KK;#pragma pack ()//de-Custom byte alignmentThe

Pack and unpack are not really easy to see in normal programs, but if you use PHP from a long time ago to generate Excel you will know. The head of his Excel is the pack.Recently, when I tried to interact with C, I used this thing again, so I had to