Stack Function Call in C

A very simple program in C language to show how to call a function using stack.

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Program Listing

#include <stdio.h>

#include <conio.h>

#include <stdlib.h>

#include <dos.h>

unsigned int far *ptr ;

void ( *p )( void ) ;

void f1( ) ;

void f2( ) ;

void main( )

{

f1( ) ;

f2( ) ;

printf ( "\nback to main..." ) ;

exit ( 1 ) ;

}

void f1( )

{

ptr = ( unsigned int far * ) MK_FP ( _SS, _SP + 2 ) ;

printf ( "\n%d", *ptr ) ;

p = ( void ( * )( ) ) MK_FP ( _CS, *ptr ) ;

( *p )( ) ;

printf ( "\nI am f1( ) function " ) ;

}

void f2( )

{

printf ( "\nI am f2( ) function" ) ;

}