How would this code for the dining philosopher problem be altered to allow user input for the amount of philosophers used? Thanks!

#include

#include

#include

#define N 5

#define THINKING 0

#define HUNGRY 1

#define EATING 2

#define LEFT (ph_num+4)%N

#define RIGHT (ph_num+1)%N

sem_t mutex;

sem_t S[N];

void * philospher(void *num);

void take_fork(int);

void put_fork(int);

void test(int);

int state[N];

int phil_num[N]={0,1,2,3,4};

int main()

{

int i;

pthread_t thread_id[N];

sem_init(&mutex,0,1);

for(i=0;i

sem_init(&S[i],0,0);

for(i=0;i

{

pthread_create(&thread_id[i],NULL,philospher,&phil_num[i]);

printf("Philosopher %d is thinking ",i+1);

}

for(i=0;i

pthread_join(thread_id[i],NULL);

}

void *philospher(void *num)

{

while(1)

{

int *i = num;

sleep(1);

take_fork(*i);

sleep(0);

put_fork(*i);

}

}

void take_fork(int ph_num)

{

sem_wait(&mutex);

state[ph_num] = HUNGRY;

printf("Philosopher %d is Hungry ",ph_num+1);

test(ph_num);

sem_post(&mutex);

sem_wait(&S[ph_num]);

sleep(1);

}

void test(int ph_num)

{

if (state[ph_num] == HUNGRY && state[LEFT] != EATING && state[RIGHT] != EATING)

{

state[ph_num] = EATING;

sleep(2);

printf("Philosopher %d takes fork %d and %d ",ph_num+1,LEFT+1,ph_num+1);

printf("Philosopher %d is Eating ",ph_num+1);

sem_post(&S[ph_num]);

}

}

void put_fork(int ph_num)

{

sem_wait(&mutex);

state[ph_num] = THINKING;

printf("Philosopher %d putting fork %d and %d down ",ph_num+1,LEFT+1,ph_num+1);

printf("Philosopher %d is thinking ",ph_num+1);

test(LEFT);

test(RIGHT);

sem_post(&mutex);

}