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For struct variables s1,s2,why can I initialize “s1={25,3.5}”,assign s2 as “s1=s2”,but then can't use "s1={59,3.14}?

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问题 In C we are allowed to assign the value of one structure variable to other if they are of the same type.In accordance with that, in my following program I am allowed to use s1=s2 when both are struct variables of the same type.But why then I am not allowed to use s1={59,3.14} after that? I know we can't assign a string "Test" to a character array arr other than in the initialization statement because for the string "Test" ,it decomposes to type char* during assignment and hence there is a

Marshalling a C# structure

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问题 I am trying to serialize the following c# structure: [Serializable] [StructLayout(LayoutKind.Sequential, Size = 70, CharSet = CharSet.Ansi)] public struct USSDContinueModel { [MarshalAs(UnmanagedType.U4)] public uint Command_Length; [MarshalAs(UnmanagedType.U4)] public uint Command_ID; [MarshalAs(UnmanagedType.U4)] public uint Command_Status; [MarshalAs(UnmanagedType.U4)] public uint Sender_ID; [MarshalAs(UnmanagedType.U4)] public uint Receiver_ID; [MarshalAs(UnmanagedType.U1)] public uint

C struct to Java JNA Structure (pointer to struct)

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问题 I have problem with JNA Structure based on C/C++ struct. Fields nScreenIndex, uVendorID, uProductID, uVersionNumber looks OK, but after them I see odd bytes. My main and only goal is to "extract" pMonitor fields. Are pMonitor declaration and MONITOR implementation correct? C/C++ origin: SCREEN* EloGetScreenByIndex (int nScreenIndex); typedef struct SCREEN_TAG { int nScreenIndex; USHORT uVendorID; USHORT uProductID; USHORT uVersionNumber; wchar_t szDevicePath [MAX_PATH]; HANDLE hCalTouchThread

Printing the structure using a single line in C?

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问题 Is there any possible way in C (by using any function or any such kind) so that we can print the contents in a structure of different datatypes using a single line? Say for eg: typedef struct ABC{ int a; char b; long c; }ABC1; To print this we need to write: printf("%d %s %ld",ABC1.a,ABC1.b,ABC1.c) Any other method so that i can print like printf("????",????ABC1) ?? 回答1: Glibc allows you to establish your own format specifiers for printf and family to let you print UDTs, which would not

Options with Options with Python argparse?

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问题 I'm writing a script in Python, and using argparse to parse my arguments. The script is supposed to compare two different "aligners" from a pool of available aligners, and each aligner has some configuration options. I want to be able to call my script with something like: ./script.py --aligner aligner1 --param 12 --aligner aligner2 --param 30 --other_param 28 I want to get out of this some sort of structure where the first --param option "belongs" to the first --aligner option, and the

structure field is function matlab

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问题 I'm asking this question to test a concept. I'm not trying to have a solution presented in code, I simply need advice as to what direction to continue. I would like to make a structure field that is always a function of other fields of the same structure. I have been able to implement code that can modify the existing structure and update it with a new field. But this doesn't work without re-initializing a code this is not ideal. I need the ability to add another structure, give it values for

C# Structure - Access class from external library

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问题 I have a question regarding correct way to structure my application. I am a beginner on C# so excuse if I have some basis missing. I looked on the web(not only stackoverflow) but didn't find any answer, so maybe this is just because I am doing something wrong? I have a project in which there are several classes to define my objects. Object1.class.cs Object2.class.cs ... Now for some functions, I created class libraries (.dll files) to externalise the code. The idea is if I need to make an

Printing the structure using a single line in C?

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Is there any possible way in C (by using any function or any such kind) so that we can print the contents in a structure of different datatypes using a single line? Say for eg: typedef struct ABC{ int a; char b; long c; }ABC1; To print this we need to write: printf("%d %s %ld",ABC1.a,ABC1.b,ABC1.c) Any other method so that i can print like printf("????",????ABC1) ?? Glibc allows you to establish your own format specifiers for printf and family to let you print UDTs, which would not otherwise be possible, through some extensions. #include <stdio.h> #include <printf.h> /* For PA_POINTER */

VB.NET Iterating through objects of a structure

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问题 I have a structure "xyz" with 3 string objects in it. "foo" "bar" and "abc" I want to iterate through the structure and compare the names of the objects. Structure xyz dim foo as string dim bar as string dim abc as string End Structure Pseudo: For each x as object in xyz if x.Name = "foo" then 'bang end if End each Is this possible? 回答1: If this is just a one time thing you're probably going to have an easier time using a Dictionary instead, but you could do this with Reflection if you prefer

Maven: POM modules and submodules hierarchy

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问题 My project is structured like this: . |--module | `-- pom.xml | --submodule | `-- pom.xml `-- pom.xml The POM's (simplified): Project: <project> <modelVersion>4.0.0</modelVersion> <artifactId>project</artifactId> <name>Project</name> <groupId>org.myorg</groupId> <version>1.0.6-SNAPSHOT</version> <packaging>pom</packaging> <modules> <module>module</module> </modules> (...) </project> Module: <project> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.myorg</groupId> <artifactId>project<