Classe Aluno

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/**
 *
 * @author univag
 */


public class aluno {

    String nome;
    String cpf;
    String telefone;
    Double n1;
    Double n2;
    Double n3;
    Double n4;

    Double media() {
        Double n = (n1 + n2 + n3 + n4) / 4.0;
        return n;
    }

}