TE Comp Sem-I MMC Prac 9 (PC2PC File)

#include<stdio.h>
#include<dos.h>
#include<string.h>
#include<conio.h>

#define PORT1 0x3f8

void main()
{
int c,ch,choice,i;

char filename[15],filename2[15],buf;
FILE *in,*out;
clrscr();
outportb(PORT1+0,0x03);
outportb(PORT1+1,0);
outportb(PORT1+3,0x03);
outportb(PORT1+2,0xc7);
outportb(PORT1+4,0x0b);
printf("\n1.sender \n2.receiver\n3.ENTER CHOICE");
scanf("%d",&choice);
if(choice==1)
{
 flushall();
 scanf("%s",filename);
 for(i=0;i<=strlen(filename);i++)
  outportb(PORT1,filename[i]);
  in=fopen(filename,"rt");
  printf("\nsending \n\n");
  while(!feof(in))
  {
     buf=fgetc(in);
     printf("%c",buf);
     outportb(PORT1,buf);
     //delay(10);
  }
  printf("\nvirus transferred succesfully");
  getch();
  exit(1);
}
else
{
   i=0;
   buf='a';
   while(buf!=NULL)
   {
      c=inportb(PORT1+5);
      if(c&1)
      {
       buf=inportb(PORT1);
       filename2[i]=buf;
       i++;
      }
}
out=fopen(filename2,"wt");
printf("\nfilename recieved:%s",filename2);
printf("\nreading from the port");
printf("\nwriting to file %s",filename2);
do
{
    c=inportb(PORT1+5);
    if(c&1)
    {
      buf=inportb(PORT1);
      printf("%c",buf);
      fputc(buf,out);
      delay(10);
    }
if (kbhit())
{
 ch=getch();
}
}while(ch!=27);
}
}