#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>

using namespace std;

// prototype for thread routine
void *print_message_function1 ( void *ptr );
void *print_message_function2 ( void *ptr );

// to pass multiple arguments
typedef struct str_thdata
{
  int thread_no;
  char message[100];
} thdata;

int main()
{
  pthread_t thread1, thread2;
  thdata data1, data2;

  // initialize data to pass to thread 1
  data1.thread_no = 1;
  strcpy(data1.message, "Hello");

  // initialize data to pass to thread 2
  data2.thread_no = 2;
  strcpy(data2.message, "World");

  // create threads 1 and 2
  pthread_create (&thread1, NULL, print_message_function1, (void *) &data1);
  pthread_create (&thread2, NULL, print_message_function2, (void *) &data2);

  pthread_join(thread1, NULL);
  pthread_join(thread2, NULL);

  exit(0);
}

void *print_message_function1 ( void *ptr )
{
  thdata *data;
  data = (thdata *) ptr;  // type cast to a pointer to thdata

  int i;
  for (i=0;i<10;i++) {
    printf("Thread %d says %s \n", data->thread_no, data->message);
  }
  pthread_exit(0);
}

void *print_message_function2 ( void *ptr )
{
  thdata *data;
  data = (thdata *) ptr;  // type cast to a pointer to thdata

  int i;
  for (i=0;i<10;i++) {
    printf("Thread %d says %s \n", data->thread_no, data->message);
  }
  pthread_exit(0);
}