client2.txt

实现关于操作系统的客户服务器的客户端

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#define MSGKEY 75
struct my_msg              
  {long mtype;             
   char text[256];         
  };

main()
{ struct my_msg msgbuf;       
int running=1;   
int login=1;  
char username[10]; 
char password[5];    
int msgid;
long int msg_to_receive=0;
msgid=msgget(MSGKEY,0777|IPC_CREAT);
if(msgid==-1)
  { printf("error\n");
    exit(0);
  }

while(login)
{
printf("Please Enter the username:");
scanf("%s",username);
printf("\nPlease Enter the password:");
scanf("%s",password);
if((strncmp(username,"jsj051070",9)==0)&&(strncmp(password,"123",3)==0))
{
printf("\nLogin Successfull\n");
login=0;
}
else
{
printf("\nLogin Fail,please try again!\n");
}
}

while(running)
{
   if (msgrcv(msgid,&msgbuf,256,msg_to_receive,0)==-1)   
     {  printf(" msgrcv error\n");
         exit(0);}
   printf("you wrote:%s",msgbuf.text);                
   if (strncmp(msgbuf.text,"end",3)==0)
         running=0; 
  printf("enter some text:");                   
  fgets(msgbuf.text,256,stdin);              
    msgbuf.mtype=1;                           
   if (msgsnd(msgid,&msgbuf,256,0)==-1)       
       {  printf(" msgsnd error\n");
         exit(0);}
   if (strncmp(msgbuf.text,"end",3)==0)      
         running=0;
}
 exit(0);
}