C #pragma

The #pragma preprocessor directive is used to provide additional information to the compiler. The #pragma directive is used by the compiler to offer a machine or operating-system feature.

Syntax:
#pragma token  

Different compilers can provide different usage of the #pragma directive.


The turbo C++ compiler supports following  #pragma directives.

• #pragma argsused  
• #pragma exit  
• #pragma hdrfile  
• #pragma hdrstop  
• #pragma inline  
• #pragma option  
• #pragma saveregs  
• #pragma startup  
• #pragma warn  

Let's see a simple example to use #pragma preprocessor directive.

#include<stdio.h>  
#include<conio.h>  
  
void func() ;  
  
#pragma startup func  
#pragma exit func  
  
void main(){  
printf("\nI am in main");  
getch();  
}  
  
void func(){  
printf("\nI am in func");  
getch();  
}
  
Output:

I am in func
I am in main
I am in func