Shape testing.

main.cpp

@@ -4,6 +4,7 @@
 #include <map>
 #include <iomanip>
 #include <vector>
+#include <cmath>
 
 using string = std::string;
 using slist = std::list<string>;
@@ -20,83 +21,76 @@ void printlm(T m){
   printm("\n");
 }
 
-class Heap {
-protected:
-  int pos {0};
-  int length {0};
-  Heap() {}
-private:
-  int size;
-  int* storage;
+class Point {
 public:
-  Heap(int sz) {
-    size = sz;
-    storage = new int[sz];
-  }
-  virtual ~Heap() {
-    delete[] storage;
-  }
-  bool isEmpty() {
-    return length == 0;
-  }
-  virtual void add(int item) {
-    if (length + 1 > size) return;
-    pos = length;
-    while (pos > 0 && storage[(pos-1)/2] < item) {
-      storage[pos] = storage[(pos-1)/2];
-      pos = (pos-1)/2;
-    }
-    storage[pos] = item;
-    ++length;
-  }
-  virtual int extractMax() {
-    int max {storage[0]};
-    storage[0] = storage[--length];
-    int first {0};
-    while ((2*first)+1 <= length - 1) {
-      int largest {(2*first)+1};
-      if ((2*first)+2 <= length - 1 && storage[largest] < storage[(2*first)+2]) largest = (2*first)+2;
-      if (storage[first] >= storage[largest]) break;
-      int swap = storage[first];
-      storage[first] = storage[largest];
-      storage[largest] = swap;
-      first = largest;
-    }
-    return max;
-  }
+  const double x;
+  const double y;
+  Point(double a, double b) : x(a), y(b) {}
 };
 
-class HeapInf : public Heap {
-  std::vector<int> storage;
+double dist(Point a, Point b) {
+  const auto dx = a.x - b.x;
+  const auto dy = a.y - b.y;
+  return sqrt(dx*dx + dy*dy);
+}
+
+std::string printp(const Point &p) {
+  return "( " + std::to_string(p.x) + " , " + std::to_string(p.y) + " )";
+}
+
+class Shape {
 public:
-  HeapInf() : Heap() {}
-  virtual ~HeapInf() {}
-  void add(int item) {
-    if (length+1>storage.size()) storage.push_back(0);
-    pos = length;
-    while (pos > 0 && storage[(pos-1)/2] < item) {
-      storage[pos] = storage[(pos-1)/2];
-      pos = (pos-1)/2;
-    }
-    storage[pos] = item;
-    ++length;
-  }
-  int extractMax() {
-    int max {(storage.size() > 0) ? storage[0] : 0};
-    storage[0] = storage[--length];
-    int first {0};
-    while ((2*first)+1 <= length - 1) {
-      int largest {(2*first)+1};
-      if ((2*first)+2 <= length - 1 && storage[largest] < storage[(2*first)+2]) largest = (2*first)+2;
-      if (storage[first] >= storage[largest]) break;
-      int swap = storage[first];
-      storage[first] = storage[largest];
-      storage[largest] = swap;
-      first = largest;
-    }
-    storage.pop_back();
-    return max;
-  }
+  virtual bool contains(Point p) const = 0;
+  virtual std::string description() const = 0;
+  virtual void scale(double s) = 0;
+  virtual ~Shape() {}
+};
+class Circle : public Shape {
+public:
+Point center;
+double radius;
+Circle(Point c, double r) : center(c), radius(r) {}
+virtual bool contains(Point p) const override {
+  return dist(center, p) <= radius;
+}
+virtual std::string description() const override {
+  return "Circle ; " + printp(center) + " ; " + std::to_string(radius);
+}
+virtual void scale(double s) override {
+  radius *= s;
+}
+};
+class Rectangle : public Shape {
+public:
+Point topleft;
+double width, height;
+Rectangle(Point tl, double w, double h) : topleft(tl), width(w), height(h) {}
+virtual bool contains(Point p) const override {
+  return topleft.x <= p.x && topleft.x + width >= p.x && topleft.y <= p.y && topleft.y + height >= p.y;
+}
+virtual std::string description() const override {
+  return "Rectangle ; " + printp(topleft) + " ; [ " + std::to_string(width) + " , " + std::to_string(height) + " ]";
+}
+virtual void scale(double s) override {
+  width *= s;
+  height *= s;
+}
+};
+class CompositeShape : public Shape {
+public:
+  Shape* shape1;
+  Shape* shape2;
+CompositeShape(Shape* s1, Shape* s2) : shape1(s1), shape2(s2) {}
+virtual bool contains(Point p) const override {
+  return shape1->contains(p) || shape2->contains(p);
+}
+virtual std::string description() const override {
+  return "Composite ; " + shape1->description() + " ; " + shape2->description();
+}
+virtual void scale(double s) override {
+  shape1->scale(s);
+  shape2->scale(s);
+}
 };
 
 int prompti(string,bool*);
@@ -104,15 +98,14 @@ double promptd(string,bool*);
 string prompts(string,bool*);
 
 int main() {
-  printlm("Create Heap:");
-  HeapInf h{};
-  bool s{true};
-  while (s) {
-    auto x {prompti("Enter integer (Finish by entering invalid): ",&s)};
-    if (s) {h.add(x);}
-  }
-  printlm("Output Heap:");
-  while (!h.isEmpty()) printlm(h.extractMax());
+  std::vector<Shape*> s {};
+  printlm("Creating Cirlces...");
+  for (int i = 0; i <= 10; ++i) s.push_back(new Circle(Point(0, i), 10));
+  printlm("Circles with the point (5, 12) within them:");
+  for (int i = 0; i < s.size(); i++) if (s[i]->contains(Point(5, 12))) printlm(i);
+  printlm("Destroying Circles...");
+  while (s.size() > 0) {delete s.back(); s.pop_back();}
+  Circle c {Poi}
   return 0;
 }