Question

Need C++ Code (Please put //comments on there too)

1.

Complete the following code:

Design a class called Circle. The class should have an integer member variable named radius and three member functions; setRadius, getRadius, calArea;

the functions' prototypes should be done inside the class declaration and the functions' definitions should come after the main function

#include <iostream>
using namespace std;

const double PI = 3.14;
// fill in the declaration of the class Circle here

int main() {
Circle c1;
int input;
cout << "please enter the radius for the circle:";
cin >> input;
c1.setRadius(input);
cout << "The radius of the circle is: " << c1.getRadius() << endl;
cout << "The area of the circle is: " << c1.calArea() << endl;
}
// fill in the implementation of the member functions here

//sample run
/*please enter the radius for the circle: 6
The radius of the circle is: 6
The area of the circle is: 113.04
Press any key to continue . . .*/

Answer 1

#include <iostream>
using namespace std;

const double PI = 3.14;
// fill in the declaration of the class Circle here
class Circle{
public:
int radius;
int getRadius();
void setRadius(int i);
double calArea();
};
int main() {
Circle c1;
int input;
cout << "please enter the radius for the circle:";
cin >> input;
c1.setRadius(input);
cout << "The radius of the circle is: " << c1.getRadius() << endl;
cout << "The area of the circle is: " << c1.calArea() << endl;
}
//writing the definations for the classes

int Circle :: getRadius(){
return radius;
}
void Circle::setRadius(int i){
radius=i;
}
double Circle:: calArea(){
return 3.1415 * radius * radius;
}

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