Illustration of Fork ( ) System call

Fork( ) System Call and process creation ( example )

 

Predict the output

 

#include<stdio.h>

#include<sys/types.h>

#include<unistd.h>

void forkcall( )

{

  int x=2;

  if(fork()==0)

      printf("child has x=%d\n",++x);

 else

      printf("parent has x=%d\n",--x);

}

int main()

{

   forkcall( );

    return 0;

}

OUTPUT:

Program output for Fork( ) system call