C Programming - C Preprocessor - Discussion

No such header files exist without .h extension.

@ALL

Is is necessary that a header files should have ".h" ?

Answer is NO.

Because the header files can have any extension but it should be included with in C program with same extension.

Let me explain what I did to check this...

In Turbo C directory

C:\Turbo>copy stdio.h stdio.hdr
C:\Turbo>copy conio.h conio.exe

Then I used the line following line to include the header file.

#include<stdio.hdr>
#include<conio.exe>
void main()
{
printf("Welcome to IndiaBIX.com !");
getch();
}

The output : Welcome to IndiaBIX.com !

We can define fact.c, filename.c in header file.

So, if you mention filename.c, it will read the entire file.

How can this possible please anyone elaborate it ?

Can you tell me what are all the other extensions other than .h ?

We know that we use many headder file such as

stdio.h, dos.h, conio.h, stdlib.h, graphics.h, iostream.h etc.

So how can you say that there is no need of this extension ?