Technical Stuff

#include<stdio.h>
#include<pthread.h>
void *print_data(void *str)
{
 char *msg = (char *)str;
 printf("given message is '%s'\n",msg);
}
main()
{
 pthread_t th1,th2;
 int ret1,ret2;
 char msg1[]="this is first message";
 char msg2[]="this is second message";
 ret1 = pthread_create(&th1,NULL, print_data,(void *)msg1);
 ret2 = pthread_create(&th2,NULL, print_data,(void *)msg2);
 printf("th1 return value is %d\n",ret1);
 printf("th2 return value is %d\n",ret2);
 pthread_join(th1,NULL);
 pthread_join(th2,NULL);
}