我这段rs232的程序请帮忙改个界面

wangwenfeng · 发表于 2004-5-9 10:26:24

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最近朋友给了段程序,怎么也看不明白.他让改个界面.高手们帮帮忙了
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#define LEN       1024
HANDLE hndCom;
char r_buf[LEN],r_b[LEN];
int head,tail;
COMSTAT ComSt;
DWORD nb;
void main()
{
DCB comd;
char cm[40],rtx[50],rty[50];
float x,y;
char sn[]="0";
head=tail=0;
hndCom = CreateFile("COM1",GENERIC_READ | GENERIC_WRITE,0,0,OPEN_EXISTING,
            0,0);
if (hndCom==INVALID_HANDLE_VALUE)
{
      printf("Could n`t Open COM1!    Press any key exit");
      getch();
      return;
}
else
{
      gotoxy(20,24);
      printf("

ress any key exit");
}
strcpy(cm,"COM1:9600,n,8,1,");
GetCommState(hndCom,&comd);
BuildCommDCB(cm,&comd);
SetupComm(hndCom,1000,1000);
SetCommState(hndCom,&comd);
int i,j,len,okx=0,oky=0;
bool loop=true;
long times=0;
DWORD n;
while (loop)
{
      if(ClearCommError(hndCom,&nb,&ComSt)==TRUE)
      {
         if (ComSt.cbInQue>0)
         {
            ReadFile(hndCom,&r_buf,ComSt.cbInQue,&n,NULL);
            r_buf[n]=0;
            for(i=0;i<n;++i)
            {
                  r_b[tail]=r_buf;
                  ++tail;
                  if (tail>=LEN) tail=0;
            }
            if (tail>=head) len=tail-head;
            else
               len=LEN-head+tail;
            i=head;
            j=0;
            while (len>0)
            {
                  if (r_b=='X' && len>=11)
                  {
                     for (j=0;j<9;++j)
                        rtx[j]=r_b[i+j+2];
                     rtx[j]=0;
                     head=head+11;
                     len=len-11;
                     if (head>=LEN) head=head-LEN;
                     if (rtx[5]=='.') okx=1;
                  }
                  if (r_b=='Y' && len>=11)
                  {
                     for (j=0;j<9;++j)
                        rty[j]=r_b[i+j+2];
                     rty[j]=0;
                     head=head+11;
                     len=len-11;
                     if (head>=LEN) head=head-LEN;
                     if (rty[5]=='.') oky=1;
                  }
                  if (okx || oky)
                  {
                     times=0;
                     WriteFile(hndCom,sn,1,&nb,NULL);
                  }
                  --len;
                  ++i;
                  if (i>=LEN) i=0;
            }//end while
            times=0;
         }//rec >0
         else
         {
            ++times;
            if (times>20000)
            {
                  WriteFile(hndCom,sn,1,&nb,NULL);
                  times=0;
            }
         }
      }
      if (okx)
      {
         gotoxy(10,10);
         printf(rtx);
         if (rtx[0]!='-')
         {
            rtx[0]=' ';
            x=atof(rtx);
         }
         else
         {
            rtx[0]=' ';
            x=atof(rtx)*-1;
         }
         printf("          X=%7.3f",x);
         okx=0;
         rtx[0]=0;
      }
      if (oky)
      {
         gotoxy(10,12);
         printf(rty);
         if (rty[0]!='-')
         {
            rty[0]=' ';
            y=atof(rty);
         }
         else
         {
            rty[0]=' ';
            y=atof(rty)*-1;
         }
         printf("          Y=%7.3f",y);
         oky=0;
         rty[0]=0;
      }
      if (kbhit())
      {
         loop=false;
      }
}
CloseHandle(hndCom);
}