What is the output of this program? #include #include #include #include #include #include struct data_st{ long int id; char buff[11]; }; int main() { int m_id,ret; struct data_st data1, data2; m_id = msgget((key_t)181,0666|IPC_CREAT); if(m_id == -1) perror("msgget"); data1.id = 1; strcpy(data1.buff,"Example"); ret = msgsnd(m_id,&data1,11,0); printf("%dn",ret); if(msgrcv(m_id,&data2,11,1,0) == -1) perror("msgrcv"); if(msgctl(m_id,IPC_RMID,0) != 0) perror("msgctl"); return 0; }