Creating child processes with fork

The process created:

#include <stdio.h>#include<stdlib.h>#include<unistd.h>#include<wait.h>intMain () {intPid=fork ();//Create Child process    if(pid==0) {printf ("d:%d\t%d\n", Getppid (), Getpid ());return 0;//Child process End    }           intPid2=fork ();//Create Child process    if(pid2==0) {printf ("c:%d\t%d\n", Getppid (), Getpid ()); Waitpid (Pid2,null,0);return 0;//Child process End    }       intpid3=Fork (); if(pid3==0)//Create Child process{printf ("b:%d\t%d\n", Getppid (), Getpid ());return 0;//Child process End} printf ("Parent Process ID Current process id\n"); printf ("a:%d\t%d\n", Getppid (), Getpid ()); Waitpid (Pid,null,0); Waitpid (Pid2,null,0); Waitpid (Pid3,null,0);//wait for the child process to end;    return 0;}

The results are as follows:

parent Process ID   current process ida:3195      6051 D: 6051      6052 C: 6051      6053 B: 6051      6054

The process created:

#include <stdio.h>#include<unistd.h>#include<wait.h>#include<stdlib.h>intMain () {intPid=fork ();intpid3; if(pid==0) {printf ("c:%d\t%d\n", Getppid (), Getpid ());return 0; }       intPid2=Fork (); if(pid2==0) {PID3=Fork (); if(pid3==0) {printf ("d:%d\t%d\n", Getppid (), Getpid ());return 0; }        Else{printf ("b:%d\t%d\n", Getppid (), Getpid ());return 0; }} printf ("Parent Process ID Current process id\n"); printf ("a:%d\t%d\n", Getppid (), Getpid ()); Waitpid (Pid,null,0); Waitpid (Pid2,null,0); Waitpid (Pid3,null,0); return 0; }

The results are as follows:

parent Process ID  current process ida:3195      6071 C: 6071      6072 B: 6071      6073 D: 6073      6074

Creating child processes with fork