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

int counter = 0;    //공유변수

void* increment(void* arg){
    for(int i = 0; i < 10000000; i++){
        counter++;
    }

    return NULL;
}

int main(){
    pthread_t t1, t2;

    pthread_create(&t1, NULL, increment, NULL);
    pthread_create(&t2, NULL, increment, NULL);

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);

    printf("Counter : %d\n", counter);

    return 0;
}