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

int counter;
volatile int value = 1;

void* countup(void *arg) {
	for (int i = 0; i < 1000000; ++i)
	{
		counter += value;
	}
	printf("%s: %d\n", arg ? "Parent" : "Child", counter);
}

int main()
{
	pthread_t thread;
	pthread_create(&thread, NULL, countup, NULL);
	countup((void*) 1);
	pthread_join(thread, NULL);
	printf("%d\n", counter);

	return 0;
}