//writer.c

    #include <stdio.h>
    #include <sys/ipc.h>
    #include <sys/msg.h>

    // structure for message queue
    struct mesg_buffer {
        int mesg_type;
        int a[5];

    } message;

    int main()
    {
    message.a [0] = 5;
    message.a [1] = 10;
    message.a [2] = 15;
    message.a [3] = 34;
    message.a [4] = 34;

        key_t key;
        int msgid;

        // ftok to generate unique key
        key = ftok(".", 65);

        // msgget creates a message queue
        // and returns identifier
        msgid = msgget(key, 0666 | IPC_CREAT);
        message.mesg_type = 1;

 // msgsnd to send message
    for(int i=0;i<5;i++)
    msgsnd(msgid, (int *) &message.a[i], sizeof(message.a), 0);



        // display the message
    for(int i=0;i<5;i++)
        printf("Data send is : %d n", message.a[i]);

        return 0;
    }

// C Program for Message Queue (Reader Process)
#include <stdio.h>
#include <sys/ipc.h>
#include <sys/msg.h>

// structure for message queue
struct mesg_buffer {
    int mesg_type;
    int a[5];
} message;

int main()
{
    key_t key;
    int msgid;

    // ftok to generate unique key
    key = ftok(".", 65);

    // msgget creates a message queue
    // and returns identifier
    msgid = msgget(key, 0666 | IPC_CREAT);

    // msgrcv to receive message
    for(int i=0; i<5; i++)
   msgrcv(msgid, &message, sizeof(message.a[i]), 1, 0);

    for(int i=0; i<5; i++)
    printf("Data Received is : %d n",
                    message.a[i]);

    // to destroy the message queue
    msgctl(msgid, IPC_RMID, NULL);

    return 0;
}