What is the output of this program? #include #include int a; void *fun_t(void *arg); void *fun_t(void *arg) { printf("%dn",a); pthread_exit("Bye"); } int main() { pthread_t pt; void *res_t; a = 10; if(pthread_create(&pt,NULL,fun_t,NULL) != 0) perror("pthread_create"); if(pthread_join(pt,&res_t) != 0) perror("pthread_join"); return 0; }