Process Class:How to give and get data from an exe file continuously???

Question

hi,,,
I am trying to run an executable file from my program to give it input and read its output....
And i am having problems...
The exe file takes one input and appends to it "1235" (ITS A TEST CASE).
When it is only for a single input , the program rums perfectly.. but when it is within a loop it does not
Pls help
Here is the code for that EXE file. (its in C)
#include<stdio.h>
int main()
char a[10];
int i;
int k=1235;
while(1){
scanf("%s",a);
if(a[0]=='s')
break;
printf("%s%d\n",a,k);
}Note that when i remove the loop here, my code is able to get and give it data.
My JAVA program::
import java.io.*;
public class Main {
  public static void main(String[] args) throws IOException {
        try {
      String line;
      Process p = Runtime.getRuntime().exec
        ("C:\\users\\Untitled3.exe");
       BufferedWriter   out=new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
          out.write("dfgsfs\n");
          time= java.lang.System.nanoTime();
          out.flush();
      BufferedReader input =new BufferedReader(new InputStreamReader(p.getInputStream()));
     while ((line = input.readLine()) != null) {
        System.out.println(input.readLine());
      input.close();
    catch (Exception err) {
      err.printStackTrace();
}PLS HELP

Answer 1

I see a problem in your C code. You're not flushing stdout after you printf and that usually means java is not seeing whats your C program is printing.
removing the loop probably works because stdout is being flushed right before exit.
I used a perl script to test your stuff and found that flushing made the trick
#!/usr/bin/perl
open(OUTFILE,">>./output.txt");
$| = 1;
while (<STDIN>) {
    if (m/.*error.*/) {
        print STDERR  $_;
    } else {
        print STDOUT  $_;
    print OUTFILE $_;
    if (m/exit/) {
        last;
close(OUTFILE);
exit;notice "$| =1;" that autoflushes in perl (just in case you were wondering where my flush call went)
Enjoy!