#include <pthread.h>

#include <semaphore.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/time.h>

#include <sys/wait.h>

#include <sys/shm.h>

#include <sys/ipc.h>

typedef struct {

    char c;

    double d;

} data;



int main() {

    int *a;

    int size = 15;



    key_t key_arr = ftok("./shm_1.c", 11);



    int shmid_arr = shmget(key_arr, size * sizeof(int), 0600 | IPC_CREAT);



    if(shmid_arr == -1) {

        perror("Error creating shm");

        exit(1);

    }



    a = (int*) shmat(shmid_arr, NULL, 0);



    for(int i = 0; i < size; i++) {

        a[i] = 2 * i;

    }



    data *d;

    key_t key = ftok("./shm_1.c", 257);



    int shmid = shmget(key, sizeof(data), 0600 | IPC_CREAT);



    if(shmid == -1) {

        perror("Error creating shm");

        exit(1);

    }



    d = (data*) shmat(shmid, NULL, 0);



    if(d == (void *) -1) {

        perror("Error attaching data");

        exit(1);

    }

    d->c = 'b';

    d->d = 3.141592653;

    shmdt(a);

    shmdt(d);

    return 0;

}