String manipulation using message Queue - C on Unix Source Code in C

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Home » C Home » C on Unix Home » String manipulation using message Queue

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Title	String manipulation using message Queue
Author	raja mukesh
Author Email	rajamukesh [at] gmail.com
Description	This program is used to perform the string manipulation using message Queue.contains 4 programs.one program is used as the header.one program for used to send the data int the messga queue and other two programs are used to reterive the message.
Category	C » C on Unix
Hits	365850
Code	Select and Copy the Code
Queue.h ------- #include<stdio.h> #include<errno.h> #include<sys/ipc.h> #include<sys/msg.h> struct queue { long type; char msg[50]; }; Queue.c ------- #include "queue.h" int main() { struct queue q; int mid; if((mid=msgget(ftok("string",0x99),0644\|IPC_CREAT))<0) { if(mid!=-1) { printf("Message Queue Error "); exit(1); } else { printf("Message Already Exist "); exit(1); } } printf(" Enter the Message Type:"); scanf("%d",&q.type); while(q.type>0) { printf(" Enter the Message:"); getchar(); gets(q.msg); if(msgsnd(mid,&q,sizeof(q),IPC_NOWAIT)<0) { printf("Message send Error "); exit(1); } printf(" Enter the Message Type:"); scanf("%d",&q.type); } return 0; } Word.c ------ #include "queue.h" #include<string.h> void word(char* str) { int i,n,w=1; n=strlen(str); for(i=0;i<n;i++) if(str[i]==' ' && str[i-1]!=' ') w++; printf("Number of Words in "%s" :%d ",str,w); } int main() { struct queue q; int mid; long type; if((mid=msgget(ftok("string",0x99),0644 ))<0) { printf("Message Queue Error "); exit(1); } printf(" Enter the Message Type to Reterive:"); scanf("%d",&type); while(msgrcv(mid,&q,sizeof(q),type,IPC_NOWAIT) && errno!=ENOMSG) { word(q.msg); } msgctl(mid,IPC_RMID,NULL); } Reverse.c --------- #include "queue.h" #include<string.h> void rev(char* str) { char s[30]; int i,j,n; n=strlen(str); printf("Reverse for "%s" :",str); for(i=n;i>=0;i--) putchar(str[i]); printf(" "); } int main() { struct queue q; int mid; long type; if((mid=msgget(ftok("string",0x99),0644 ))<0) { printf("Message Queue Error "); exit(1); } printf(" Enter the Message Type to Reterive:"); scanf("%d",&type); while(msgrcv(mid,&q,sizeof(q),type,IPC_NOWAIT) && errno!=ENOMSG) { rev(q.msg); } }

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