Erro ao compilar programa[resolvido]

class Conta{
	protected double saldo;
	
	void deposita(double valor){
		this.saldo += valor;
	}
	
	void saca(double valor){
		this.saldo -= valor;
	}
	
	double getSaldo(){
		return this.saldo;
	}
	
	void atualiza(double taxa){
		this.saldo += this.saldo * taxa;
	}
}

class ContaCorrente extends Conta{
	void atualiza(double taxa){
		this.saldo += (super.atualiza(taxa)) * 2;
	}
	
	void deposita(double valor){
		this.saldo += valor - 0.10;
	}
}

class ContaPoupanca extends Conta{
	void atualiza(double taxa){
		this.saldo += (super.atualiza(taxa)) * 3;
	}
}

class TestaContas{
	public static void main(String[] args){
		Conta c = new Conta();
		Conta cc = new ContaCorrente();
		Conta cp = new ContaPoupanca();
		
		/*c.deposita(1000);
		cc.deposita(1000);
		cp.deposita(1000);
		
		c.atualiza(0.01);
		cc.atualiza(0.01);
		cp.atualiza(0.01);*/
		
		System.out.println(c.getSaldo());
		System.out.println(cc.getSaldo());
		System.out.println(cp.getSaldo());
	}
}