Shape testing.

main.cpp

@@ -3,6 +3,8 @@
 #include <algorithm>
 #include <map>
 #include <iomanip>
+#include <vector>
+#include <cmath>
 
 using string = std::string;
 using slist = std::list<string>;
@@ -19,28 +21,91 @@ void printlm(T m){
   printm("\n");
 }
 
+class Point {
+public:
+  const double x;
+  const double y;
+  Point(double a, double b) : x(a), y(b) {}
+};
+
+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:
+  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*);
-int prompti(string,bool*);
+double promptd(string,bool*);
 string prompts(string,bool*);
 
 int main() {
-  printlm("Parse comma deliminated list:");
-  bool s {};
-  slist lst {};
-  auto v = prompts("Enter the string: ", &s);
-  if (!s) {
-    printlm("Error, No Data!");
-    return -1;
-  }
-  auto comma = find(v.cbegin(),v.cend(),',');
-  lst.push_back(string(v.cbegin(),comma));
-  do {
-    auto start = ++comma;
-    comma = find(start,v.cend(),',');
-    lst.push_back(string(start, comma));
-  } while(comma != v.cend());
-  printlm("All entries:");
-  for (const auto c : lst) printlm(c);
+  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;
 }