Create ClassConstr1

Author: BrowserGameDijkstra

ClassConstr1

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+#include <cstdlib>
+#include <iostream>
+
+using namespace std;
+
+
+#include <math.h>
+
+
+const double PI = 3.14159;
+
+// class interface (definition)
+class Circle	
+{
+public:
+// constructors
+Circle(); // default constructor
+Circle(const Circle &); // copy constructor
+
+// member functions (methods)
+void SetRadius(double);	// modifier that sets new radius
+double Area();
+
+private:
+// member variables (data)
+double radius;	// circle's radius
+};
+
+int main()
+{
+Circle myCircle;	// circle object used as an example
+double circleArea = 0.0;	// area of the circle
+double userInput = 0.0;	// user input for radius of circle
+
+cout << "Enter radius of the circle: ";
+cin >> userInput;
+
+myCircle.SetRadius(userInput);
+circleArea = myCircle.Area();
+
+cout << "The area is " << circleArea << endl << endl;
+
+return 0;
+}// end of main
+
+// class implementation
+
+// default constructor
+Circle::Circle()
+{
+radius = 0.0;
+}
+
+// copy constructor
+Circle::Circle(const Circle & Object)
+{
+radius = Object.radius;
+}
+
+// sets the radius of the circle
+void Circle::SetRadius(double IncomingRadius)
+{
+radius = IncomingRadius;
+}
+
+// computes the area of the circle
+double Circle::Area()
+{
+return(PI * pow(radius, 2));
+}