c1.c

linux课程实验作业。客户端与服务端程序。简单的算术运算功能。

#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define MSGKEY 75
struct msgform
{
   long mtype;
  int action;
    char user[10],pass[20];
  float num1,num2,rs;
 char op;
   char mtext[256];
    
};

main()
{
 struct msgform msg;
  int msgqid,pid,*pint;
   char ch;
       char pw1[20],pw2[20];
printf("************************\n");
  printf("***WELCOME TO OUT SYSTEM***\n");
 printf("************************\n");
for(;;)
{ msg.action=0;
printf("*******input 1: LOAD SYSTEM \n");
   printf("*******input 2: NEW USER\n");
    printf("*******input q: EXIT\n");
   while((ch=getchar())=='\n');
      printf("%c\n",ch);
switch(ch)
    {
   case '1':
        // load();
printf(">>INPUT USERNAME:>>\n");
                          scanf("%s",msg.user);
                     printf(">>INPUT PASSWORD:>>");
                             scanf("%s",msg.pass);
             msg.action=1;
                 
          break;
    case '2':
       //    new();
printf(">>INPUT USERNAME:>>\n");
                          scanf("%s",msg.user);
                     printf(">>INPUT PASSWORD:>>");
                             scanf("%s",pw1);
                       printf(">>INPUT PASSWORD AGAIN:>>");
                                     scanf("%s",pw2);
                    if(strcmp(pw1,pw2)==0)
                                                         {strcpy(msg.pass,pw1);msg.action=2;printf("dd");}
                                       else {printf("d");}
                  break;
    case 'q':
                  printf("*** THANK YOU FOR YOUR USING ***\n");
                          exit(0);
         default:
                              printf("PLEASE INPUT THE RIGHT CHAR\n");
              exit(0);
                       
   }
   msgqid=msgget(MSGKEY,0777);
   pid=getpid();
pint=(int *)msg.mtext;
  *pint=pid;
  msg.mtype=1;
  msgsnd(msgqid,&msg,sizeof(struct msgform),0);
   msgrcv(msgqid,&msg,512,pid,0);
  printf("receive:aciton=%d\n",msg.action);
if(msg.action==3)
  { printf("load success...\n");
          msg.action=10;
      }
else if(msg.action==4)
{ printf("zhece success...\n");
          msg.action=10;
}
else if(msg.action==-1)
{ printf("wrong username or password\n");
}
else if(msg.action==-2)
{printf("THIS NAME IS ALREADY EXIST\n");
}
if(msg.action==10)
{            
      printf("***NOW LET'S BEGING...***\n");
     for(;;)
     {
      printf("*** TYPE q FOR EXITING,ELSE FOR CONTINUE ***\n");
               while((ch=getchar())=='\n');
                            if(ch=='q') break;
       printf(">>Please input oprator number1: ");
         scanf("%f",&msg.num1);
  printf("read %f\n",msg.num1);
         printf(">>Please input oprator (+,-,*,/): ");
           for(;;)
{ ch=getchar();
    if(ch=='+' || ch=='-'|| ch=='*' || ch=='/') break;
}
 printf("%c\n",ch);
msg.op=ch;
         
     printf(">>Please input oprator number2: ");
   scanf("%f",&msg.num2);
      printf("read %f\n",msg.num2);
   pint=(int *)msg.mtext;
  *pint=pid;
  msg.mtype=1;
  msgsnd(msgqid,&msg,sizeof(struct msgform),0);
   msgrcv(msgqid,&msg,512,pid,0);
   
      printf("client :receive from pid%d\n",*pint);
       printf("ANSWER COMED FROM SERVER : %f\n", msg.rs); 
                }
   }
}
}