How do you link a C++ program to C functions?

Asked by Last Modified  

5 Answers

Learn C++ Language

Follow 0
Answer

Please enter your answer

Sarvachan Verma

Computer Programming

Just include hedears file
Comments
Dislike Bookmark

IT Technical Trainer

If you want to use existing C functions in the C++ program, you can make use of "extern C". The compiler output for both C and C++ would be different. Extern C would give an indication to the C++ compiler to generate compiled output of the respective function in C format.
Comments
Dislike Bookmark

Experienced IT Trainer with 17 years of experience in IT Industry

In order to call a C function from C++ code, you would use the “extern “C”” keyword when declaring the function in C. Then, you would call the function just like you would call any other function. An example will help clarify this: /*this is what the C++ code would look like for the declaration...
read more
In order to call a C function from C++ code, you would use the “extern “C”” keyword when declaring the function in C. Then, you would call the function just like you would call any other function. An example will help clarify this: /*this is what the C++ code would look like for the declaration of the foo function, which is defined somewhere else in C code: */ extern "C" void foo( ); And then to call the function in the C++ code, it would look like this: //the declaration: extern "C" void foo(); void main() { // the function call: foo( ); } read less
Comments
Dislike Bookmark

To call a C function from C++ code, you would use the “extern “C”” keyword when declaring the function in C. Then, you would call the function just like you would call any other function.
Comments
Dislike Bookmark

Software Engineer

In the C++ code you need to declare the C function as extern "C"
Comments
Dislike Bookmark

View 3 more Answers

Related Questions

What is the main difference between returning value of a function and does not return any value of a function in  C. Which is correct void main(void), int main(void), int main(int) , or void main(int) and explain the main difference between int main() and int main(void). 
A function may or may not return a value to the calling function. If the function is returning a value, then you have to mention the data type in the function definition and funtion declaration (like int,...
Mahesh Kondawar
What is the best IDE for C and C++ development?
If you're a student then Turbo C++ is best for C and C++ program + inbuilt C/C++ Graphics Function If you're a professional or working then Netbeans for C/C++ or Code:: Blocks is Best.
Balakrishnasingh
Are C Programmers currently in demand?
Ofcourse, C is alwasy in demand. In the beginning a lot of the big project developed in C language. Now a days, there are a lot of language in market and speciallity is growing in IT field. For a big organization...
Harsha
Is C/C++ language is still important in 2019?
Of course, C language is only the heart of any processor or controller.Because of complexity in C peoples are looking to work on High-level languages like JAVA etc.
Tejas
0 0
7
What is C++
A high-level programming language developed by Bjarne Stroustrup at Bell Labs. C++ adds object-oriented features to its predecessor, C. C++ is one of the most popular programming language for graphical...
Shoaib

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

C++ Program-Working with constant using const keyword
//Header files #include<iostream.h>#include<conio.h> //Main function void main(){ //using const keyword to declare constants with a specific type const int len=10; const int br=5; const...

Salim Ahmed Ansari

0 0
0
Upcasting and Downcasting
Converting a derived-class reference or pointer to a base-class reference or pointer is called upcasting. It is always allowed for public inheritance without the need for an explicit type cast. The downcasting,...

Vijay Kumar

4 0
0
Memory Layout in C++ vis-a-vis Polymorphism and Padding bits.
I know there is no need for the knowledge of memory layout for a normal day-to-day development of C++. However, when someone goes in the bit/byte level of C++, he needs to look for such discussion. To...

Somenath Mukhopadhyay

0 0
0
Creating a class in c++
Introduction Before we proceed with understanding as to how to create a class in c++, we need to first understand the what is a class. Definition : A class is a container of related data and methods...
M

Mahesh C

0 0
0
File Handling in C++ : Lesson 1 Data Persistence
Data persistence refers to the existence of data in the program. In other words, it means the life of data. Data is the most significant part of a program and it must be stored properly and easily retrieved...
J

Jigyasa Sidhu

0 0
0

Recommended Articles

About C++ Programming Language

Introduction C++ is an excellent programming language and many of the applications are written in C++ language. It has generic, object-oriented & imperative programming features, and also provides facilities for low-level memory manipulation. Successor of C language, it is an OOP (object oriented programming) language...

Read full article >

Why Should you Become an IT Consultant

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

Read full article >

Make a Career as a BPO Professional

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

8 Hottest IT Careers of 2014!

Whether it was the Internet Era of 90s or the Big Data Era of today, Information Technology (IT) has given birth to several lucrative career options for many. Though there will not be a “significant" increase in demand for IT professionals in 2014 as compared to 2013, a “steady” demand for IT professionals is rest assured...

Read full article >

Find CPP Language near you
CPP Language in Bangalore
CPP Language in Delhi
CPP Language in Hyderabad
CPP Language in Pune
CPP Language in Mumbai
CPP Language in Chennai
CPP Language in Kolkata
CPP Language in Noida
CPP Language in Gurgaon
CPP Language in Jaipur

Looking for C++ Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you