Question

我在SimulationEngine基类中创建一个名为RiskFactor的枚举。

class SimulationEngine
{
public:
    enum RiskFactor { interest_rate, equities, volatility };
    SimulationEngine(double horizon, Wrapper<valuationFunction>& theFunction_, RiskFactor simulatedRiskFactor);
    virtual void DoOnePath(double vol, double normvariate) = 0;
    virtual SimulationEngine* clone() const = 0;
    const virtual double GetHorizon();
    const Wrapper<valuationFunction>& GetFunction() const;
    RiskFactor simulatedRiskFactor;
protected:
    double horizon;
    Wrapper<valuationFunction> theFunction;
};

在派生类中，我拥有此方法，在调用对象“ TheFunction”的方法时使用RiskFactor枚举类型的“ simulatedRiskFactor”。

void OneStepBSEngine::DoOnePath(double vol, double normvariate)
{
    double variance = vol * vol * horizon;
    double rootVariance = sqrt(variance);
    double itoCorrection = -0.5 * variance;
    //double movedSpot = spotvalue * exp(drift * horizon + itoCorrection);
    //spotvalue = movedSpot * exp(rootVariance * normvariate);
    double factor = exp(drift * horizon + itoCorrection + rootVariance * normvariate);
    theFunction->RiskFactorMultiply(factor, simulatedRiskFactor);
    return;
}

我应该如何使“ theFunction”类寻找它来识别枚举并允许我编写最后一行（尚不可用）：

theFunction->RiskFactorMultiply(factor, simulatedRiskFactor);

该类当前如下所示：

class valuationFunction
{
public:
    valuationFunction(double TTM);
    virtual void ValueInstrument() = 0;
    virtual double GetValue() const;
    virtual void RiskFactorAdd(double increment) = 0;
    virtual void RiskFactorMultiply(double factor) = 0;
    virtual void UpdateTTM(double timeStep);
    virtual valuationFunction* clone() const = 0;
    virtual ~valuationFunction() {}
private:

protected:
    double f;
    double TTM;
};

我希望能够用枚举RiskFactor调用RiskFactorAdd和RiskFactorMultiply函数。

Answer 1

RiskFactorMultiply的声明需要使用包含的类名来限定枚举名称。

class valuationFunction
{
// ...
    virtual void RiskFactorMultiply(double factor, SimulationEngine::RiskFactor risk) = 0;
// ...
};

如果例如RiskFactorMultiply要使第二个参数可选，则枚举值也是如此。

    virtual void RiskFactorMultiply(double factor, SimulationEngine::RiskFactor risk = SimulationEngine::volatility) = 0;

如何使枚举被其他班级认可

1 个答案: