java练习---3

//程序员：罗元昊 2017.9.6
public class World{
public static void main(String[] args){
double p=3.14,i=5.50;

System.out.println(" 圆的面积："+ p*i*i+ "cm2");

System.out.println(" 圆的周长："+ 2*i*p +"cm");

}
}