How to auto-include all headers in directory

Question

I\'m going through exercises of a C++ book. For each exercise I want to minimize the boilerplate code I have to write. I\'ve set up my project a certain way but it doesn\'t seem

Answer 1

Make a master include file containing the names of all the headers you want.

It's a really bad idea to include *, even if you could.

Answer 2

writing a makefile rule to pass the name of the executable as a -DHEADERFILE=something parameter to the compiler shouldn't be difficult at all. Something like:

%.exe : %.h %.cpp main.cpp
    gcc -o $< -DHEADER_FILE=$<F $>

OTOH, I don't know if #include does macro expansion on the filename.

Answer 3

If you build your code using make, you should be able to do this.

Can I include all headers in the directory so at least I don't have to change the #include line?

Change your include line to something like #include <all_headers.h>. Now, you can let your Makefile auto-generate all_headers.h with a target like:

all_headers.h:
    for i in `ls *.h`; do echo "#include <$i>" >>all_headers.h; done

Make sure that all_headers.h is getting deleted when you 'make clean'.

Better yet, can I rewrite my solution so that I don't even have to touch main.cpp, without having one file with all the code for every exercise in it?

You can do this if you abstract away your class with a typedef. In your example, change your class name from E0614 to myClass (or something). Now, add a line to your Makefile underneath the for loop above that says echo "typedef "$MY_TYPE" myClass;" >>all_headers.h. When you build your program, invoke 'make' with something like make MY_TYPE=E0614 and your typedef will be automatically filled in with the class you are wanting to test.

Answer 4

try this:-

#ifndef a_h
#define a_h

#include <iostream>
#include <conio.h>
#incl....as many u like
class a{
f1();//leave it blank
int d;
}
#endif //save this as a.h

later include this in ur main program that is cpp file

#include "a.h"

...your program