#include

#include

char string0[] = char string1[] = char string2[] =

main(){

char buf[1024]; int i, fds0[2],

"Hello, this is the parent process"; "Hi, this is the child process 1"; "Hi, this is the child process 2";

fds1[2], fds2[2];

pipe(fds0); //pipe used by the parent process--zs pipe(fds1); //pipe used by the child 1 process--zs pipe(fds2); //pipe used by the child 2 process--zs

//The first child process is created.--zs if(fork()==0) {

close(fds0[1]);

//read from the parent --zs read(fds0[0], buf, sizeof(string0)); printf("child 1 reads: %s ", buf);

//write child message to parent via its pipe--zs close(fds1[0]);

write(fds1[1], string1, sizeof(string1)); exit(0);

}

//The second child process--zs else if(fork()==0) {

sleep(1);

close(fds0[1]);

//Get something from the parent process--zs read(fds0[0], buf, sizeof(string0)); printf("child 2 reads: %s ", buf);

//write child message into fds2 close(fds2[0]);

write(fds2[1], string2, sizeof(string2)); exit(0);

}

else {//Parent process starts--zs

//write parent message into fds0 close(fds0[0]);

write(fds0[1], string0, sizeof(string0));

//read child 1 message from its associated pipe--zs close(fds1[1]);

read(fds1[0],buf,sizeof(string1));

printf("parent reads from Child 1: %s ", buf);

//write something into fds0 again to child 2--zs close(fds0[0]);

write(fds0[1], string0, sizeof(string0));

//read child 2 message from its associated pipe--zs close(fds2[1]);

read(fds2[0],buf,sizeof(string2));

printf("parent reads from Child 2: %s ", buf); exit(0);

}

}

modify the example such that thr parent creates 8 child process