Producer and consumer - segmentation fault - c

Question

I'm a beginner in concurrent programming and I want to implement a consumer and producer. I want to send after 3 seconds from producer two integers and I want to print the sum of numbers from producer.
After running the code I have Segmentation fault :(.
Thank you for help :D
This is my code for producer:
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define VECTOR_SIZE 2
struct msgbuf
{
long mtype;
int vector[VECTOR_SIZE];
};
int main() {
int msqid;
// int msgflg = IPC_CREAT | 0666;
key_t key;
struct msgbuf sbuf;
size_t buflen;
int i;
key = ftok(".", 'g');
//Get the message queue ID for the given key
if ((msqid = msgget(key, IPC_CREAT | 0666 )) < 0) {
perror("Could not get message queue\n");
exit(1);
}
printf("MSQID value: %d\n", msqid);
//Message Type
sbuf.mtype = 1;
while(1){
for(i = 0; i < 2; i++){
printf("Enter a message to add to message queue : ");
scanf("%d",sbuf.vector[i]);
buflen = strlen(sbuf.vector[i]) + 1 ;
}
sleep(3);
}
// getchar();
if (msgsnd(msqid, &sbuf, buflen, IPC_NOWAIT) < 0)
{
printf ("%d, %ld, %d, %d\n", msqid, sbuf.mtype, sbuf.vector[0], sbuf.vector[1], (int)buflen);
perror("Could not send message!\n");
exit(1);
}
else
printf("Message Sent\n");
exit(0);
}
And here I have the code for consumer:
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdio.h>
#include <stdlib.h>
#define MAXSIZE 128
#define VECTOR_SIZE 2
struct msgbuf
{
long mtype;
char vector[VECTOR_SIZE];
};
int main() {
int msqid;
key_t key;
struct msgbuf rcvbuffer;
// key = 1234;
key = ftok(".", 'g');
if ((msqid = msgget(key, 0666)) < 0) {
perror("Could not get message queue\n");
exit(1);
}
printf("MSQID value: %d\n", msqid);
// Receive an answer of message type 1.
if (msgrcv(msqid, &rcvbuffer, MAXSIZE, 1, 0) < 0) {
perror("Could not receive message!\n");
exit(1);
}
printf("%d\n", rcvbuffer.vector[0] + rcvbuffer.vector[1]);
return 0;
}