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#include<stdio.h>
#include<sys/ipc.h>
#include<sys/msg.h>
#include<sys/types.h>
#include<stdlib.h>
#define SIZE 2000 
int main() { 
int mfd, mfd2, mfd3; 
struct { 
double mtype; 
char mtext[2000]; 
} s1, s2, s3; 
if ((mfd = msgget(1000, IPC_CREAT | 0666)) == -1) { 
perror("msg_get:"); 
exit(1); 
} 
s1.mtype = 1; 
sprintf(s1.mtext, "%s", "This is message1"); 
if (msgsnd(mfd, &s1, 1000, 0) == -1) { 
perror("msg_snd"); 
exit(1); 
} 
if ((mfd2 = msgget(1000, IPC_CREAT | 0666)) == -1) { 
perror("msg_get:"); 
exit(1); 
} 
s2.mtype = 1; 
sprintf(s2.mtext, "%s", "This is message2"); 
if (msgsnd(mfd2, &s2, 1000, 0) == -1) { 
perror("msg_snd"); 
exit(1); 
} 
if (( 
mfd3 = msgget(1000, IPC_CREAT | 0666) 
) == -1) { 
perror("msg_get:"); 
exit(1); 
} 
s3.mtype = 1; 
sprintf(s3 
.mtext, "%s", "This is message3"); 
if ( 
msgsnd(mfd3, 
&s3, 1000, 0) == -1) { 
perror("msg_snd"); 
exit(1); 
} 
printf("Your message has been sent successfully...\n"); 
printf("Please visit another (receiver's) terminal...\n"); 
return 0; 
}