Input output sample - 02

Input Specification:
Input file will consist of several lines. Each line contains two integers a and b.  Input is terminated by a line containing two zeroes. This line should not be processed.

Output Specification:
For each line of input produce one line of output. This line contain the value of c, where c = a*b. After each test case, you should print a blank line. 

Sample Input:
2 2
3 3
0 0 

Sample Output:
4

9


Pascal Code:
program sample2 (input, output);

var a,b: integer;

begin
    while not eof(input) do begin
        readln(a,b);
        if (a=0) and (b=0) then break;
        writeln(a*b);
        writeln('');
    end;
end.


C Code: 
#include <stdio.h> 

int main(){
  int a,b,c;

  while(scanf("%d %d",&a,&b)==2){
      if(a==0&&b==0)break;
      c = a*b;
      printf("%d\n\n",c);
  }
  return 0;
}


C++ Code: 
#include <iostream>

using namespace std;   

int main(){
     int a,b,c;

     while(cin>>a>>b){
          if(a==0&&b==0)break;
          c = a*b;
          cout<<c<<endl<<endl;
     }
     return 0;
}


Java Code:
import java.io.*;
import java.util.*; 

class Main{

     public static void main (String args[]) throws IOException{
          BufferedReader bf = new BufferedReader( new InputStreamReader ( System.in ));

          StringTokenizer token;
          String input;
          int a,b,c;
          while((input = bf.readLine())!=null){
              token = new StringTokenizer(input);
              a = Integer.parseInt(token.nextToken());
              b = Integer.parseInt(token.nextToken());
              if(a==0 && b==0)break;
              c = a*b;
              System.out.println(c);
              System.out.println();
          }
     }
}