I have a C++ program (.cpp) inside which I wish to use some of the functions which are present inside the C header files such as stdio.h, conio.h, stdlib.h, graphics.h, devices.h etc.
I could include the stdio.h library inside my cpp file as : #include <cstdio>.
How do I include the other library files?
How do I add the graphics.h library?
I'm using Microsoft Visual Studio 6.0 Enterprise Edition and also Turbo C++ 3.0.
For a list of C standard C headers (stdio, stdlib, assert, ...), prepend a c and remove the .h. For example stdio.h becomes cstdio.
For other headers, use
extern "C"
{
#include "other_header.h"
}
#ifdef __cplusplus
extern "C"
{
#endif
// your functions here for the header
#ifdef __cplusplus
}
#endif
This format should help you use the header files for both C and C++ without any problem ...
Hope this helps...:)
I'm not sure what you need exactly, but if you want to use old fashioned C functions inside you C++ program, you can easy include them by removing the .h and add a "c" prefix.
for example if you want to include math.h use
#include <cmath>
Just include them inside a extern "C" block an they should work like expected.
You can #include them using their original names. #include <stdio.h> works just fine in C++.
来源：https://stackoverflow.com/questions/3329159/including-c-headers-inside-a-c-program