How do you link a C++ program to C functions?
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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 |
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7 Answers Microsoft, Tata Elxsi, Wipro,
STL 
