#include <iostream>
#include <cstdlib>
#include <signal.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <unistd.h>

using namespace std;

struct sharedMemory
{
    int right;
    int flag[2];
};

int Id;
sharedMemory* segment;

// I omitted the other functions (like proccess()), they work fine... I guess the error is somewhere here, in the main() structure

void delete(int errorCode)
{
    (void) shmdt((char *) segment);
    (void) shmctl(Id, IPC_RMID, NULL);
    exit(0);
}

int main()
{
    Id = shmget(IPC_PRIVATE, sizeof(sharedMemory)*100, 0600);
    if (Id == -1)
    {
        cout << "Shared memory couldn't be allocated. The end."
        << endl;
        return -1;
    }
    segment = (sharedMemory *) shmat(Id, NULL, 0);
    segment->right = 0;
    segment->flag[0] = 0;
    segment->flag[1] = 0;
    sigset(SIGINT, delete);
    if (fork() == 0)
    {
        proccess(0);
        exit(0);
    }
    if (fork() == 0)
    {
        proccess(1);
        exit(0);
    }
    wait();
    wait();
    delete(0);
    return 0;
}