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

void *inc_x(void *x_void_ptr)
{
    int *x_ptr=(int *)x_void_ptr;

    while(++(*x_ptr)<100);
    printf("x increment finished\n");
    sleep(2);

    return NULL;
}

int main()
{
    int x = 0;
    int y = 0;

    printf("x:%d,y:%d\n",x,y);
    pthread_t inc_x_thread;
    if
 
(pthread_create(&inc_x_thread,NULL,inc_x,&x))
    {
        fprintf(stderr,"Error creating thread\n");
        return 1; 
    }    
    while(++y<100);
    printf("y increment finished\n");

    if(pthread_join(inc_x_thread, NULL))
    {
        fprintf(stderr,"Error joining thread\n");
        return
 
 2;
    }   
    printf("x:%d,y:%d\n",x,y);

    return 0;
}