compile error:c language in telnet(linux)

Posted by lilyrose07 on Stack Overflow See other posts from Stack Overflow or by lilyrose07
Published on 2010-04-28T15:17:23Z Indexed on 2010/04/28 15:23 UTC
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#include<stdio.h>

#include<unistd.h>

#include<stdlib.h>

#include<pthread.h>

int count=0;

void *thread_function(void *arg)

{







while(count<10)

{

if(count%2==1)

{

count++;

}

else

{sleep(1);}



}





}



int main(int argc,int *argv)

{

int res;

pthread_t a_thread[2];

void *thread_result;

int n;







while(count<10)

{

if(count%2==0)

{printf("%d",count);

count++;

}

else{sleep(1);}

}





for(n=0;n<2;n++)

{

pthread_create(&(a_thread[n]),NULL,thread_function,NULL);

}



while(count==9)

{pthread_join(a_thread[0],&thread_result);

}

while(count==10)

{

pthread_join(a_thread[1],&thread_result);

}

printf("%d",count);



return 0;





}

in telnet,linux

i write gcc za.c

error list: undefined reference to pthread_create,pthread_join in function 'main'

//why??

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