C++ опытные специалисты,подскажите!

#include <iostream>
#include <string>
#include <sstream>
#include <functional>
 
template <typename T>
class AbstractTaskFunction {
public:
    AbstractTaskFunction(T data) : _data(data) {}
    static std::string inputInfo(){
        return std::string();
    };
    virtual std::string result() const = 0;
protected:
    std::function<T(const T)> _taskFunction;
    T _data;
};
 
template <typename T>
class CarEnginePowerConverter : public AbstractTaskFunction<T>{
public:
    CarEnginePowerConverter(T data) : AbstractTaskFunction<T>(data){
        this->_taskFunction = [](const T data)->T {
            return data*0.7457f;
        };
    }
    static std::string inputInfo(){
        return "Enter the car power in HP:";
    }
    std::string result() const{
        std::ostringstream strs;
        strs << this->_data << " HP = " << this->_taskFunction(this->_data) << " kilowatt.";
        return strs.str();
    }
};
 
template <typename T>
class SpaceConverter : public AbstractTaskFunction<T>{
public:
    SpaceConverter(T data) : AbstractTaskFunction<T>(data){
        this->_taskFunction = [](const T data)->T {
            return data*63240;
        };
    }
    static std::string inputInfo(){
        return "Enter the number of light years:";
    }
    std::string result() const{
        std::ostringstream strs;
        strs << this->_data << " light years = " << this->_taskFunction(this->_data) << " astronomical units.";
        return strs.str();
    }
};
 
template <typename T>
class FahrenheitConverter : public AbstractTaskFunction<T>{
public:
    FahrenheitConverter(T data) : AbstractTaskFunction<T>(data){
        this->_taskFunction = [](const T data)->T {
            return data*9/5 + 32;
        };
    }
    static std::string inputInfo(){
        return "Enter the temperature in Celsius:";
    }
    std::string result() const{
        std::ostringstream strs;
        strs << this->_data << " degrees Celsius = " << this->_taskFunction(this->_data) << " degrees Fahrenheit.";
        return strs.str();
    }
};
 
int main(int argc, const char * argv[]) {
    
    double inputData;
    
    std::cout << CarEnginePowerConverter<double>::inputInfo();
    std::cin >> inputData;
    std::cout << (new CarEnginePowerConverter<double>(inputData))->result() << std::endl;
    
    std::cout << SpaceConverter<double>::inputInfo();
    std::cin >> inputData;
    std::cout << (new SpaceConverter<double>(inputData))->result() << std::endl;
    
    std::cout << FahrenheitConverter<double>::inputInfo();
    std::cin >> inputData;
    std::cout << (new FahrenheitConverter<double>(inputData))->result() << std::endl;
    
    return 0;
}