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

void* print1(void* arg) {
    printf("This is Function 1 - go to sleep\n");
    sleep(5);
    printf("Function1 out of sleep\n");
    printf("%s", (char*)arg);
    return NULL;
}

void* print2(void* arg) {
    printf("This is Function 2 - go to sleep\n");
    sleep(5);
    printf("Function2 out of sleep\n");
    printf("%s", (char*)arg);
    return NULL;
}

void* func(void* arg) {
    int* ptr = (int*)arg;
    printf("Parent gave %d\n", *ptr);
    return NULL;
}

int main(int argc, char** argv) {
    pthread_t thread1, thread2, thread3;
    int intvar = 12;

    pthread_create(&thread1, NULL, print1, "Thread1 Executing ...\n");
    pthread_create(&thread2, NULL, print2, "Thread2 Executing ...\n");
    pthread_create(&thread3, NULL, func, &intvar);
    printf("going to sleep\n");
    printf("out of sleep\n");
    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);
    pthread_join(thread3, NULL);
    return 0;
}