#include <stdio.h>
#include <stdlib.h>
#include <sys/msg.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <string.h>

#define CLEF 20

struct msgbuf {
long mtype; //Type
int a;
int b;
double resultat;
char operande[1];
int quitter;
};

struct msgbuf msgp;

int main(void)
{
    int msid, a, b, quitter;

    msgp.resultat = 0.;
    msqid = msgget((key_t)CLEF, 0); //créa message
    printf("Link started !\n");
    printf("a : ");
    scanf("%d", &a);
    printf("\nb : ");
    scanf("%d", &b);
    printf("\noperande : ");
    fgetc(stdin);
    scanf("%1[+-]s", msgp.operande);
    fgetc(stdin);
    printf("quitter apres le resultat (1 : oui\t0:non) : ");
    scanf("%d", &quitter);
    msgp.a = a;
    msgp.b = b;
    msgp.quitter = quitter;

    int type = (int)time();
    msgp.mtype = type;
    msgsnd(msqid, &msgp, sizeof(msgp), NULL);
    msgrcv(msqid, &msgp, sizeof(msgp), (long)type, NULL);

    printf("%d %s %d = %lf", msgp.a, msgp.operande, msgp.b, msgp.resultat);
    if(quitter == 1)
        msgctl(msqid, IPC_RMID, IPC_NOWAIT);
    return 0;
}