Lab_5_Binary_Semaphor.c

#include<stdio.h>
#include<pthread.h>
#include<unistd.h>
#include<semaphore.h>
#define true 1
#define false 0

int a, b;
sem_t sem;
void* inputno() {
    while(true) {
        printf("Enter two numbers: ");
        scanf("%d %d", &a, &b);

        sem_post(&sem);
        sleep(4);
    }
}

void* outputsum() {
    while(true) {
        sem_wait(&sem);
        printf("Sum = %d\n", a+b);
    }
}

int main() {
    pthread_t thread1;
    pthread_t thread2;

    sem_init(&sem, 0, 0);

    pthread_create(&thread1, NULL, inputno, NULL);
    pthread_create(&thread2, NULL, outputsum, NULL);

    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);

    printf("Both threads finished!\n");
    sem_destroy(&sem);

    return 0;
}