add Circle

.gitignore

@@ -0,0 +1,2 @@
+*.o
+*.out

Circle.cpp

@@ -0,0 +1,24 @@
+#include "Circle.h"
+#include <iostream>
+
+Circle::Circle(double center_x, double center_y, double radius)
+{
+    centerX = center_x;
+    centerY = center_y;
+    Radius = radius;
+}
+
+double Circle::calc_area()
+{
+    return 0.1;
+}
+
+double Circle::calc_perimiter()
+{
+    return 0.1;
+}
+
+void Circle::name()
+{
+    std::cout << "Circle" << std::endl;
+}

Circle.h

@@ -0,0 +1,15 @@
+#include "Figure.h"
+
+class Circle: public Figure
+{
+    private:
+    double centerX, centerY, Radius;
+
+    public:
+    Circle(double center_x, double center_y, double radius);
+    Circle(struct Point center, double radius);
+
+    double calc_area();
+    double calc_perimiter();
+    void name();
+};

Figure.h

@@ -0,0 +1,13 @@
+struct Point
+{
+    double x, y;
+};
+
+
+class Figure
+{
+    public:
+    virtual double calc_area() = 0;
+    virtual double calc_perimiter() = 0;
+    virtual void name() = 0;
+};

circle_main.cpp

@@ -0,0 +1,9 @@
+#include "Circle.h"
+
+using namespace std;
+
+int main() {
+    Circle c(23, 24, 5);
+    c.name();
+    return 0;
+}

makefile

@@ -0,0 +1,11 @@
+circle: Circle.o circle_main.o
+	g++ Circle.o circle_main.o
+
+circle_main.o: circle_main.cpp
+	g++ -c circle_main.cpp
+
+Circle.o: circle_main.cpp
+	g++ -c Circle.cpp
+
+clean:
+	rm -rf *.o all