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#include <pthread.h>

int pthread_create(pthread_t *thread,pthread_attr_t *attr,
void *(*start_routine)(void *),void *arg);
void pthread_exit(void *retval);
int pthread_join(pthread *thread,void **thread_return);

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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <pthread.h&


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