How do you link a C++ program to C functions?
- 4 Answers
- 17724 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / ravindranath m
The C++ compiler does something called as "name mangling"
for functions, while a C compiler does not. Name mangling
is a process wherein the name of the original function in a
c++ program gets changed to a new name via adding some
prefix and/or postfix to it.
As a result, a c program cannot find the required definition
when trying to link to a cpp object file.
This can be resolved by putting the following declaration in
a c++ header file that contains the cpp function declarations.
#ifdef __cplusplus
extern "C" {
#endif
// function declarations go here...
// ...
#ifdef __cplusplus
}
#endif
| Is This Answer Correct ? | 25 Yes | 4 No |
Answer / nikhil upadhyay
By using the extern "C" linkage specification around the C function declarations.
Programmers should know about mangled function names and type-safe linkages. Then they should explain how the extern "C" linkage specification statement turns that feature off during compilation so that the linker properly links function calls to C functions. Another acceptable answer is "I don't know. We never had to do that." Merely describing what a linker does indicates that the programmer does not understand the issue that underlies the question.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / prabakaran
including the header file #include<stdio.h>
| Is This Answer Correct ? | 3 Yes | 20 No |
What is time h in c++?
Which is best c++ or java?
What is #include iostream in c++?
what is data abstraction in C++?
Explain the isa and hasa class relationships.
What are the techniques you use for debugging?
What are the two types of polymorphism?
Explain the problem with overriding functions
Write a program for Divide a number with 2 and Print the output ( NOTE: Check for divide by zero error).
Is c++ the most powerful language?
What is the use of string in c++?
When can you tell that a memory leak will occur?
STL 
