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#include <stdio.h>

#include <pthread.h>

#include <string.h>

#include <stdlib.h>

#include <unistd.h>

void *tfn1(void *args){

printf("the sub thread sleeping 5 seconds \n");

sleep(5);

printf("the thread done \n");

return NULL;

}

int main() {

int iRet;

pthread_t tid;

pthread_attr_t attr;

iRet = pthread_create(&tid, NULL, tfn1, NULL);

if(iRet){

printf("can't create thread %s \n", strerror(iRet));

return iRet;

}

iRet = pthread_detach(tid);

if(iRet){

printf("can't detach thread %s \n", strerror(iRet));

return iRet;

}

printf("hello\n");

iRet = pthread_join(tid, NULL);

if(iRet){

printf("pthread has been detached \n");

return iRet;

}

printf("the main thread sleeping 8 seconds \n");

sleep(8);

printf("the main thread done \n");

return 0;

}