int main() {
// set the radius equal to -1 so we can ensure that
// the user isgiving us valid input
// what was the point of a constructor that has us
// set radius=0?
double radius = -1;
// keeps asking for radius until positive radius is entered
do {
cout << "Please enter a radius: ";
cin >> radius;
} while (radius < 0);
// create a pointer to an instance of a circle
Circle * c = new Circle(radius);
// output the area diameter, and circumference measurements
cout << "The Area of your circle is: " << c->getArea() << endl;
cout << "The Diameter of your circle is: " << c->getDiameter() << endl;
cout << "The Circumference of your circle is: " << c->getCircumference() << endl;
// free up the memory we used for c
// How do we know if we should do this in the main or in the class?
delete [] c;
return 0;
}
int main() {
Circle circle;
double radius;
cout<<"enter the circle's radius: ";
cin>>radius;
circle.setRadius(radius);
cout<<"the circle's area is "<<circle.getArea()<<endl;
cout<<"the circle's diameter is "<<circle.getDiameter()<<endl;
cout<<"the circle's circumference is "<<circle.getCircumference()<<endl;
return 0;
}
/*
* The Circle main thread
*/
int main(int argc, char** argv) {
double radius;
cout << "Please enter the radius of a circle: ";
cin >> radius;
Circle* circle = new Circle(radius);
cout << "The area of this circle is: " << circle->getArea() << endl;
cout << "The diameter of this circle is: " << circle->getDiameter() << endl;
cout << "The circumference of this circle is: " << circle->getCircumference() << endl;
return 0;
}