prob36Angajat

abstract class Angajat{
    private String nume;
    public Angajat(String s){
        nume=s;
    }
    public abstract double calculSalar();
    public boolean equals(Object o) {
        if(o instanceof Angajat)
            return (((Angajat)o).nume == nume);
        else
            return false;
    }
    public String getNume()
    {
        return nume;
    }
}
class AngajatCuSalarFix extends Angajat{
    private double salar;
    public AngajatCuSalarFix(String n, double s){
        super(n);
        salar=s;
    }
    public double calculSalar(){
        return salar;
    }
    public void  schimbaSalarFix(double d){
        this.salar=d;
    }
}
class AngajatCuOra extends Angajat{
    private double sal_ora;
    private Double[] tab = new Double[31];
    private int nr;
    public AngajatCuOra(String n, double s){
        super(n);
        sal_ora=s;
    }
    public void adaugaOre(double o){
        int x=nr+1;
        if(x<31)
        {
            tab[nr]=o;
            nr++;
        }
    }
    public void  schimbaSalarPeOra(double d){
        this.sal_ora=d;
    }

    public double calculSalar(){
        int i;
        double ore=0;
        for(i=0;i<nr;i++)
            ore+=tab[i];
        return sal_ora*ore;
    }
}

class Firma{
    private Angajat[] a = new Angajat[1024];
    private int nr;
    public int angajeaza(Angajat ang){
        int x=nr+1;
        int i,c=0;
        for(i=0;i<nr;i++)
            if(ang.equals(a[i])==true) c++;

        if(x>1024)
            return -1;
        else
            if(c!=0)
                return -2;
        else
        {
            a[nr]=ang;
            nr++;
            return 0;
        }
    }
    public String toString(){
        String s="Firma\n";
        int i;
        for(i=0;i<nr;i++)
            s+=a[i].getNume()+" "+a[i].calculSalar()+" ";
        return s;
    }
    public double salarMediu(){
        int i;
        double sum=0;
        if(nr==0) return 0;
        for(i=0;i<nr;i++)
            sum+=a[i].calculSalar();
        return sum/nr;
    }
}

class ClientFirma{
    public static void main(String[] argv){
        Angajat a1 = new AngajatCuSalarFix("Ang1", 1000);
        Angajat a2 = new AngajatCuSalarFix("Ang2", 900);
        Angajat a3 = new AngajatCuSalarFix("Ang3", 1090);
        Angajat a4 = new AngajatCuOra("Ang4", 100);
        ((AngajatCuOra)a4).adaugaOre(2);
        ((AngajatCuOra)a4).adaugaOre(9);
        ((AngajatCuOra)a4).adaugaOre(7);
        ((AngajatCuOra)a4).adaugaOre(8);
        ((AngajatCuSalarFix)a2).schimbaSalarFix(800);
        Firma f = new Firma();
        f.angajeaza(a1);
        f.angajeaza(a2);
        f.angajeaza(a3);
        f.angajeaza(a4);
        System.out.println(f);
        System.out.println(f.salarMediu());
    }
}