例题4-1 求圆的面积
public class Example4_1{
public static void main(String[] args){
double radius;
double area;
radius=12.23;
area=3.14*radius*radius;
System.out.printf("半径是%5.3f的圆的面积是:\n%5.3f\n",radius,area);
}
}
public class Example4_1{
public static void main(String[] args){
double radius;
double area;
radius=12.23;
area=3.14*radius*radius;
System.out.printf("半径是%5.3f的圆的面积是:\n%5.3f\n",radius,area);
}
}