Update figures.cpp

task2/figures.cpp

@@ -1,3 +1,69 @@
 #include "figures.hpp"
+#include <cmath>
 
-static constexpr double PI = 3.14;
+Rect::Rect(double width, double height) : width(width), height(height) {}
+
+FigureType Rect::Type() const {
+    return FigureType::RECTANGLE;
+}
+
+double Rect::Perimeter() const {
+    return 2 * (width + height);
+}
+
+double Rect::Area() const {
+    return width * height;
+}
+
+Triangle::Triangle(double sideA, double sideB, double sideC) 
+    : sideA(sideA), sideB(sideB), sideC(sideC) {}
+
+FigureType Triangle::Type() const {
+    return FigureType::TRIANGLE;
+}
+
+double Triangle::Perimeter() const {
+    return sideA + sideB + sideC;
+}
+
+double Triangle::Area() const {
+    double semiPerimeter = Perimeter() / 2;
+    return std::sqrt(semiPerimeter * (semiPerimeter - sideA) * (semiPerimeter - sideB) * (semiPerimeter - sideC));
+}
+
+Circle::Circle(double radius) : radius(radius) {}
+
+FigureType Circle::Type() const {
+    return FigureType::CIRCLE;
+}
+
+double Circle::Perimeter() const {
+    return 2 * PI * radius;
+}
+
+double Circle::Area() const {
+    return PI * radius * radius;
+}
+
+std::unique_ptr<Figure> make_figure(FigureType type, double paramA, double paramB, double paramC) {
+    if (paramA < 0 || paramB < 0 || paramC < 0) {
+        throw LessThanZeroParam("One or more parameters are less than zero");
+    }
+
+    switch (type) {
+        case FigureType::RECTANGLE:
+            return std::make_unique<Rect>(paramA, paramB);
+
+        case FigureType::TRIANGLE:
+            if (paramA + paramB <= paramC || paramB + paramC <= paramA || paramA + paramC <= paramB) {
+                throw WrongTriangle("Invalid triangle sides");
+            }
+            return std::make_unique<Triangle>(paramA, paramB, paramC);
+
+        case FigureType::CIRCLE:
+            return std::make_unique<Circle>(paramA);
+
+        default:
+            return nullptr;
+    }
+}