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Old Nov 3rd, 2005, 5:34 PM   #1
mariogarcia
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[beginner] how to reverse the contents of a table

Hello,
I really am blocked now... I can't figure out the algorith to inverse the contects of a table... and I have been working on it for quite a while now but I don't get decent results..
here's my code
class Table{
    int contenu[];
    int taille;

     Table(){
            System.out.println("quelle est la taille du tableau à créer");
            taille = Clavier.lireInt();
            contenu = new int[taille];
            initValue();
         }

         Table(int n){
           taille = n;
           contenu = new int[taille];
           initValue();
         }

         private void initValue(){
           System.out.println("valeur de chacune des cases");
           for(int i=0;i<taille;i++){
             contenu[i]= Clavier.lireInt();
           }
         }
   // fonction d'affichage
   public String toString(){
        String s="[";
        for(int i=0;i<taille-1;i++)
	       s=s+contenu[i]+",";
           s=s+contenu[taille-1]+"]";
        return(s);
   }

   public void reverse(){
      int tab2[]= new int[taille];
      for(int i = taille-1; i>=0;i--){
         int k =0 ;
         tab2[k] = contenu[i];
         k++;
      }
      for (int i=0;i<taille;i++){
         contenu[i]= tab2[i];
      }
   }

   public void sort(){
     int j;
     for(int i=1;i<taille;i++){
        for(j=0;contenu[j]<contenu[i];j++);
        int tampon = contenu[i];
        for (int k=i;k>j;k--)
            contenu[k] = contenu[k-1];
        contenu[j] = tampon;
     }

   }
}
public class Tableau{
   public static void main(String args[]){
      Table tab = new Table(5);
      tab.sort();
      System.out.println( "tableau trié " + tab);
      Table tab1 = new Table();
      System.out.println("tableau non inverse  " +tab1);
      tab1.reverse();
      System.out.println("tableau inversé " +tab1);


   }
}
some of it it's in french but it really doens't matter.. I just need to know why my code of public void reverse() doesn't work... and how should I proceed to debug the program..
thanks in advance,
Mario
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