Need someone to chek my code n tell me if the asserts work. Please!!

Question

Hi , its importante that someone could help me on my code.
the code is the greatest common divisor ( Maximo divisor comum)
Well , the code is all right but i can't run it with the asserts , im using Eclipse 3.1 , the level of compilation is 1.3 .
It says that ignores de asserts but when i compile it gives me error on assert expression.
I would like to someone could test this code in another JAva editor like XEmacs or JBuilder ,anything that works with asserts and accept them.
Someone working with linux could test this too?
Just wanna see if the assertions are right , because i can't run the program with them in the eclipse. :S
Its importante, help me please.
Code:
import pt.iscte.io.*;
public class gCommonDivisor {
public static void main(String[] args){
      assert 0 < n : n;     //  <--  THERE THEY ARE  : (
      assert 0 < d : d;  // n is the numerator and d is the denomi.
System.out.println("Insira valor do numerador: ");
          int n = Teclado.intLido();
          System.out.println("Insira valor do denominador: ");
          int d = Teclado.intLido();
          int r = mdc( n, d); // modulo para o maximo divisor comum
          int den = denominador(r , d); // modulo para denominador simplificado
          int num = numerador(r, n); // modulo para numerador simplificado
          // Output do Maximo divisor comum e da frac�ao reduzida
          System.out.println("Maximo divisor comum entre "+ n +" e "+ d +" � "+ r);
          System.out.print("Frac��o reduzida de "+ n +"/"+ d +" = "+ num +"/"+ den);
           * @pre V.
           * @post gcd = maximo divisor comum
          static int mdc(int n, int d){
          int gcd = 1;
          int k =1;
          while (k <= n && k <= d) {
               if (n % k == 0 && d % k == 0)
                    gcd =k;
               k++;
               return gcd;
          // numerador simplificado
          static int numerador(int r , int n ) {
          int numerador = n / r;
          return numerador;
          // denominador simplificado
          static int denominador(int r , int d ) {
          int denominador = d / r;
          return denominador;
} Thank you so much .
Please help me!
Sorry about the language of the code. but dont worry about it, the code works fine without those two asserts after the main.
kind regards,
Josh

Answer 1

wow i forgot to say that u just need to change the
expression to read the input from the console.
U dont have the iscte_io.jar
change int n = Teclado.intLido();
and int m = Teclado.intLido();
cuz u don't have the Teclado( Keyboard) i had to import pt.iscte.io.Teclado;
to read the input given by the user.
thks