extern functions

by: terrencel | last post by:

I was told to look at some old C code that was ported to C++. One of the file is like: ========================================= CPPClass* someCPPVar = NULL; extern "C" {

C / C++

extern "C" linker error ---- please explain

by: Generic Usenet Account | last post by:

Our C++ program was linked with some legacy C functions. We had used the extern "C" declaration, and everything was working fine. Then someone thought that it would be better to have a consistent...

C / C++

why can't a template function have extern "C" linkage?

by: Ian | last post by:

The title says it all. I can see the case where a function is to be called directly from C, the name mangling will stuff this up. But I can't see a reason why a template function can't be...

C / C++

Static linkage and extern "C"

by: Mark A. Gibbs | last post by:

I have a question about mixing C and C++. In a C++ translation unit, I want to define a function with internal linkage and C calling convention. Here's a sample of what I want to do: //...

C / C++

extern

by: DevarajA | last post by:

Can anyone explain me what extern is used for? I thought it was used to declare variables definited in other files, but i can do that also without extern. /*file a.c*/ int a=5; int main() {...

C / C++

Use of 'extern' keyword

by: siliconwafer | last post by:

Hi all, I wanted to know that is use of extern keyword mandatory in case of global variables and functions used in other source files? i.e consider a following piece of code from MSDN explaining...

C / C++

functions that take many arguments...... + extern - what about it?

by: Martin Jørgensen | last post by:

Hi, Problem: ======== Some of my output functions are beginning to take pretty many arguments... I mean.... We're talking about 10-15 arguments :-) So I thought to myself, perhaps this is...

C / C++

Questions about extern "C" linkage directive

by: mimi | last post by:

The programmer indicates to the compiler that a function is written in a different programming language using a linkage directives.It is intuitive that extern "SomeLanguage" is used to declare...

C / C++

Exposing private member functions to extern C function

by: Anonymous | last post by:

I have a class that needs to be accesed by a C API. I need to expose some private methods to the C API : #ifdef __cplusplus extern "C" #endif void peek(Object_Handle handle); void...

C / C++

extern "c" usage?!!

by: Medvedev | last post by:

What's that preprocessor do #ifdef __cplusplus extern "C" { #endif .. .. .. #ifdef __cplusplus } #endif

C / C++

Migrating Website to Cloud - Emmanuel Katto

by: emmanuelkatto | last post by:

Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel

General

Looking to do Android software development, any suggestions? Is flutter better?

by: nemocccc | last post by:

hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?

General

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...

General

Changing the language in Windows 10

by: Hystou | last post by:

Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...

Windows Server

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

General

Access Europe - Using VBA to create a class based on a table - Wed 1 May

by: isladogs | last post by:

The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

Microsoft Access / VBA

Couldn’t get equations in html when convert word .docx file to html file in C#.

by: conductexam | last post by:

I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and...

C# / C Sharp

extern functions

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