diff options
Diffstat (limited to 'usth/ICT2.2/labwork/5/virtual.cc')
-rw-r--r-- | usth/ICT2.2/labwork/5/virtual.cc | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/usth/ICT2.2/labwork/5/virtual.cc b/usth/ICT2.2/labwork/5/virtual.cc new file mode 100644 index 0000000..23ae78a --- /dev/null +++ b/usth/ICT2.2/labwork/5/virtual.cc @@ -0,0 +1,61 @@ +#include <cmath> +#include <iostream> +#include <memory> +#include <string> +#include <vector> + +using namespace std; + +static constexpr double PI = acos (-1.0); + +class Shape +{ +public: + virtual string get_name () const = 0; + + virtual double cal_area () const { return 0.0; } + virtual double cal_vol () const { return 0.0; } +}; + +class Point : public Shape +{ +public: + double x, y; + Point (double a, double b) : x {a}, y {b} {} + + string get_name () const override { return "Point"; } +}; + +class Circle : public Shape +{ +public: + double x, y, r; + Circle (double a, double b, double c) : x {a}, y {b}, r {c} {} + + string get_name () const override { return "Circle"; } + double cal_area () const override { return r * r * PI; } +}; + +class Cylinder : public Shape +{ +public: + double x, y, r, h; + Cylinder (double a, double b, double c, double d) + : x {a}, y {b}, r {c}, h {d} {} + + string get_name () const override { return "Cylinder"; } + double cal_area () const override { return (r + h) * r * PI * 2.0; } + double cal_vol () const override { return r * r * h * PI; } +}; + +int +main () +{ + vector<unique_ptr<Shape>> v; + v.push_back (make_unique<Point> (1.0, 2.0)); + v.push_back (make_unique<Circle> (3.0, 4.0, 5.0)); + v.push_back (make_unique<Cylinder> (6.0, 7.0, 8.0, 9.0)); + for (auto& p : v) + cout << p->get_name () << " of area " << p->cal_area () + << " and volume " << p->cal_vol () << endl; +} |