Q.a) Explain in your own words this C program.

b) Explain, using sample output, what will happen if the two "thread_join" statements were removed.

#include #include #include void *print_message_function( void *ptr); main() pthread t thread1, thread2; char *message1"I am Thread 1 "; char *message2 = "I am Thread 2 "; int iretl, iret2; ret1 iret2 pthread pthread create( create( &thread!, &thread2, NULL, NULL, print print message message function, function, (void*) (void*) message!); message2); = = pthread join( thread2, NULL); pthread join( thread1, NULL); printf("Thread printf("Thread printf("end of exit(0); 1 returns: %d ",iret!); 2 returns: %d ",iret2); main program "); void *print_message function void *ptr char *message; message-(char ) ptr; printf("%s ", message)