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

volatile int x=0;

void* timer_1s(void *vargp){
    for(int i=0; i<10; i++){
        sleep(1); // wait 1s
        printf("1s-Tick\n");
        x++;
    }
    return NULL;   
}

void* timer_2s(void *vargp){
    for(int i=0; i<5; i++){
        sleep(2);
        printf("2s-Tick, t=%ds\n", x);
    }
    return NULL;
}


int main(){
    pthread_t thread_1 = 0;
    pthread_t thread_2 = 0;

    printf("Wir starten nun beide Timer:\n");
    pthread_create(&thread_1, NULL, timer_1s, NULL);
    pthread_create(&thread_2, NULL, timer_2s, NULL);

    pthread_join(thread_1, NULL);
    pthread_join(thread_2, NULL);

    printf("Wir sind nun fertig mit dem Programm, tschüss!\n");
    return 0;    
}