Answer :
Answer:import java.util.Scanner;
import (*software used for shapes*);
public class (*enter class name*){
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
System.out.println("Enter radius: ");
double r = scan.nextDouble();
Circle c = new Circle(r);
double area = c.getArea();
System.out.println("Area: "+area);
System.out.println("Radius is being doubled...");
r = c.getRadius();
c.setRadius(r*2);
area = c.getArea();
System.out.println("Area: "+area);
Explanation:
I know this is late, but I am putting this here for future people trying to solve this problem.
The C code is given by:
void areaCircle(double r){
double A;
A = pi*r*r;
printf("Area: %lf\n", A);
r *= 2;
A = pi*r*r;
printf("Radius is being doubled \n");
printf("Area: %lf\n", A);
}
The input is taken in:
int main(){
double r;
scanf("%lf\n", &r);
return 0;
}
--------------------
The function is declared as void, as it does not return anything, and has the radius as input, thus:
void areaCircle(double r){
}
The area is [tex]A = \pi r^2[/tex], thus, inserting and printing in the code.
void areaCircle(double r){
double A;
A = pi*r*r;
printf("Area: %lf\n", A);
}
Doubling the radius and printing the new area, the complete code is:
void areaCircle(double r){
double A;
A = pi*r*r;
printf("Area: %lf\n", A);
r *= 2;
A = pi*r*r;
printf("Radius is being doubled \n");
printf("Area: %lf\n", A);
}
As for the input:
int main(){
double r;
scanf("%lf\n", &r);
return 0;
}
A similar problem is given at https://brainly.com/question/14316064