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#include <iostream>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <cstring>

struct PersonalData {
    char name[50];
    char fatherName[50];
    char cnic[20];
    char registration[20];
};

int main() {
    // Use a hardcoded key instead of ftok()
    const key_t key = 12345;  // Any unique integer

    // Create shared memory segment
    int shmid = shmget(key, sizeof(PersonalData), 0666 | IPC_CREAT);
    if (shmid == -1) {
        perror("shmget failed");
        return 1;
    }

    // Attach to shared memory
    PersonalData* data = (PersonalData*)shmat(shmid, nullptr, 0);
    if (data == (void*)-1) {
        perror("shmat failed");
        return 1;
    }

    // Write data
    strcpy(data->name, "abc");
    strcpy(data->fatherName, "xyz");
    strcpy(data->cnic, "42201-1234567-8");
    strcpy(data->registration, "2022-CS-123");

    std::cout << "Data written to shared memory:\n"
              << "Name: " << data->name << "\n"
        << "Father's Name: " << data->fatherName << "\n"
              << "CNIC: " << data->cnic << "\n"
              << "Registration: " << data->registration << std::endl;

    
    std::cout << "Waiting for receiver (press Ctrl+C to exit)...\n";
    while (true) {
        sleep(1);  
    }

    
    return 0;
}