Spicyztrickz

#include <pthread.h>
#include <stdio.h>
struct num
{
int thread_num;
int count;
};

void* char_print (void* number)
{

struct num* p = (struct num*) number;
int i = (p->count *(p->count + 1))/2;
printf("Now in thread %d: \n", p->thread_num);
printf("The sum is: %d\n", i);
//fputc (i, stderr);
return NULL;
}

int main ()
{
pthread_t thread1_id;
pthread_t thread2_id;

struct num thread1_args;
struct num thread2_args;
//thread1_args.count = 3;
printf("Enter the number: ");
scanf("%d" , &(thread1_args.count));
thread1_args.thread_num = 1;
pthread_create (&thread1_id, NULL, &char_print, &thread1_args);
pthread_join(thread1_id, NULL);

printf("Enter the number: ");
scanf("%d" , &(thread2_args.count));
thread2_args.thread_num = 2;
pthread_create (&thread2_id, NULL, &char_print, &thread2_args);


pthread_join(thread2_id, NULL);
return 0;
}

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

sem_t mutex;
int c = 0;

void *thread(void *arg){
 sem_wait(&mutex);
 printf("%d%d\n", c, c);
 c++;
 sem_post(&mutex);
 sleep(1);
}

int main(){
 while(1){
  
  sem_init(&mutex, 0, 1);
  pthread_t t1, t2;
  pthread_create(&t1, NULL, thread, NULL);
  sleep(1);
  pthread_create(&t2, NULL, thread, NULL);
  pthread_join(t1, NULL);
  pthread_join(t2, NULL);
  sem_destroy(&mutex);
 }
 return 0;
}