gistfile1.java

Public class Aluno {
     private int mat;
     private String nome;
     private float CRE;
     // constructores e métodos gets e sets
}

Public class TabelaHash {
     private Aluno[] tabela;
     public static final N = 100;
     // constructor

     float calculaMedia (int mat) {
          int h = mat%N;
          Aluno a = tab[h];
          int count = 0;
          float medias = 0f;
          while (a != NULL) {
               if (a.getMatricula() == mat) {
                  medias += a.CRE;   
                  count++;
               }
               a = a.getProximo();
          }
          return (count != 0 ? medias/count : medias)
     }
}