/******************************************************************************* FILE: hello_arg1.c* DESCRIPTION:*   A "hello world" Pthreads program which demonstrates one safe way*   to pass arguments to threads during thread creation.* AUTHOR: Blaise Barney* LAST REVISED: 04/05/05******************************************************************************/#include <pthread.h>#include <stdio.h>#include <stdlib.h>#define NUM_THREADS	8char *messages[NUM_THREADS];void *PrintHello(void *threadid){   int *id_ptr, taskid;   sleep(1);   id_ptr = (int *) threadid;   taskid = *id_ptr;   printf("Thread %d: %s\n", taskid, messages[taskid]);   pthread_exit(NULL);}int main(int argc, char *argv[]){pthread_t threads[NUM_THREADS];int *taskids[NUM_THREADS];int rc, t;messages[0] = "English: Hello World!";messages[1] = "French: Bonjour, le monde!";messages[2] = "Spanish: Hola al mundo";messages[3] = "Klingon: Nuq neH!";messages[4] = "German: Guten Tag, Welt!"; messages[5] = "Russian: Zdravstvytye, mir!";messages[6] = "Japan: Sekai e konnichiwa!";messages[7] = "Latin: Orbis, te saluto!";for(t=0;t<NUM_THREADS;t++) {  taskids[t] = (int *) malloc(sizeof(int));  *taskids[t] = t;  printf("Creating thread %d\n", t);  rc = pthread_create(&threads[t], NULL, PrintHello, (void *) taskids[t]);  if (rc) {    printf("ERROR; return code from pthread_create() is %d\n", rc);    exit(-1);    }  }pthread_exit(NULL);}