c++ - 错误 : invalid conversion from 'int' to 'const char*' [-fpermissive]

Question

我遇到了一个错误，我不知道为什么。

我有一个子类:(标题)

    class motionSensor: public sensorLeaf
{
public:
    motionSensor(const int& sensorID, const int& sensorType, bool sensorActivate);

继承自父类(super class)“sensorLeaf”

子类有 2 个私有(private)变量
const float minDistance;
const float maxDistance;
在我的类(class)文件中；这是我的构造函数:

    motionSensor::motionSensor(const int &sensorID, const int &sensorType, bool sensorActivate)
 :sensorLeaf(sensorID, sensorType, sensorActivate), minDistance{1.0f}, maxDistance{5.0f}

但是一旦我编译它，我就会收到以下错误:

/home/jb/EmergencySensor/motionsensor.cpp:8: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
  :sensorLeaf(sensorID, sensorType, sensorActivate), minDistance{1.0f}, maxDistance{5.0f}
                                                                                        ^

Sensorleaf 构造函数是:

sensorLeaf::sensorLeaf(const int sensorID, const std::string sensorType, bool sensorActivate)
{
    _sensorID = sensorID;
    _sensorType = sensorType;
    _sensorActivate = sensorActivate
}

作为私有(private)变量:

private:  
    int _sensorID;
    std::string _sensorType;
    bool _sensorActivate;

};

在做了一些研究之后，我发现当您将字符串定义为 ' ' 而不是 ""时可能会发生错误，但我没有在任何地方使用它。

Answer 1

您正试图强制 const int &sensorType来自 motionSensor构造函数到 const std::string sensorType的 sensorLeaf构造函数。

 motionSensor::motionSensor(const int &sensorID, const int &sensorType, bool sensorActivate)
------------------------------------------------------------^
 :sensorLeaf(sensorID, sensorType, sensorActivate), minDistance{1.0f}, maxDistance{5.0f}
-----------------------^

sensorLeaf::sensorLeaf(const int sensorID, const std::string sensorType, bool sensorActivate)
-------------------------------------------------------------^