sending signal from parent to child

I am using this tutorial from website http://ift.tt/1fXCwYE and trying to understand why signal is not recieved by child?

here is the code:

 #include <stdio.h>  
 #include <signal.h>
 #include<stdlib.h>  
 void sighup(); /* routines child will call upon sigtrap */  
 void sigint();  
 void sigquit();  
 void main()  
 { int pid;  
  /* get child process */  
   if ((pid = fork()) < 0) {  
     perror("fork");  
     exit(1);  
   }  
   if (pid == 0)  
    { /* child */  
     signal(SIGHUP,sighup); /* set function calls */  
     signal(SIGINT,sigint);  
     signal(SIGQUIT, sigquit);  
     for(;;); /* loop for ever */  
    }  
  else /* parent */  
    { /* pid hold id of child */  
     printf("\nPARENT: sending SIGHUP\n\n");  
     kill(pid,SIGHUP);  
     sleep(3); /* pause for 3 secs */  
     printf("\nPARENT: sending SIGINT\n\n");  
     kill(pid,SIGINT);  
     sleep(3); /* pause for 3 secs */  
     printf("\nPARENT: sending SIGQUIT\n\n");  
     kill(pid,SIGQUIT);  
     sleep(3);  
    }  
 }  
 void sighup()  
 { signal(SIGHUP,sighup); /* reset signal */  
   printf("CHILD: I have received a SIGHUP\n");  
 }  
 void sigint()  
 { signal(SIGINT,sigint); /* reset signal */  
   printf("CHILD: I have received a SIGINT\n");  
 }  
 void sigquit()  
 { printf("My DADDY has Killed me!!!\n");  
  exit(0);  
 }