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

void* print_message(void *param){

	for(int i = 0; i < 10; i++){
		usleep(10000);
		puts(param);
	}
	int *retval = (int*)malloc(sizeof(int));
	*retval = 49;
	return retval;
}

int main(){
	pthread_t T1, T2;
	pthread_create(&T1, 0, print_message, "Hi");
	pthread_create(&T2, 0, print_message, "Bye");
	int *retval;
	pthread_join(T1, (void**) &retval);
	printf("print_message returned %d\n", *retval);
	free(retval);
	pthread_join(T2, (void**) &retval);
	free(retval);
	return 0;
}