lab9

#include <iostream>
template<typename T>
class Curve
{
private:
    T x, y, y1;
public:
    Curve(T x) {
        y = x*x+2;
        y1 = x - 2;
    }
    const T operator+(const Curve& a) const {
        return y + a.y1;
    }
    const T operator-(const Curve& a) const {
        return y- a.y1;
    }
    const T operator*(const T& a) const {
        return (y*a);
    }

    T operator()(T x) {
        return y;
    }
    T getY(){
        return y;
    }

};
int main()
{
    Curve<double> c1(6.0);
    Curve<double> c2(4.0);
    std::cout <<c1.getY() <<std::endl;
    std::cout <<c2.getY() << std::endl;
    std::cout <<(c2 - c1) <<std::endl;
    std::cout <<(c1*4.0) << std::endl;
    std::cout << c1(4.0) << std::endl;
    return 0;
}