extern functions

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Does this make sense? Calling C++ inside extern "C" block

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++

2167

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++

5961

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++

6137

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++

448

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++

16593

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++

2298

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++

6240

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++

5037

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++

2914

extern "c" usage?!!

by: Medvedev | last post by:

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

C / C++

7135

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

7410

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

Online Marketing

7505

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

5650

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...

Career Advice

5060

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

3215

Trying to create a lan-to-lan vpn between two differents networks

by: TSSRALBI | last post by:

Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The...

Networking - Hardware / Configuration

3201

Windows Forms - .Net 8.0

by: adsilva | last post by:

A Windows Forms form does not have the event Unload, like VB6. What one acts like?

Visual Basic .NET

1570

transfer the data from one system to another through ip address

by: 6302768590 | last post by:

Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...

C# / C Sharp

774

How to add payments to a PHP MySQL app.

by: muto222 | last post by:

How can i add a mobile payment intergratation into php mysql website.

PHP