JAVA50. 根据周长求面积
描述
输入描述
周长输出描述
面积（计算时请使用Math类中的常量，面积为double类型，保留三位小数，四舍五入部分预设代码已经完成）示例1
输入:
4
输出:
1.273 1.000
Java 解法, 执行用时: 38ms, 内存消耗: 12384KB, 提交时间: 2022-02-10
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextDouble()) {
double s = scanner.nextDouble();
// Circle和Square是需要你定义的类
System.out.println(String.format("%.3f",new Circle(s).getArea()));
System.out.println(String.format("%.3f", new Square(s).getArea()));
}
}
}
class Shape {
private double s; // 周长
public Shape(double s) {
this.s = s;
}
public double getS() {
return s;
}
}
interface Area {
double getArea(); // 面积
}
// 圆形
class Circle extends Shape implements Area {
//write your code here......
public Circle (double s){
super(s);
}
double r=getS()/(2*Math.PI);
@Override
public double getArea(){
return Math.PI*r*r;
}
}
// 方形
class Square extends Shape implements Area {
//write your code here......
public Square(double s){
super(s);
}
double r=super.getS()/4;
@Override
public double getArea(){
return r*r;
}
}
Java 解法, 执行用时: 40ms, 内存消耗: 12372KB, 提交时间: 2021-11-25
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextDouble()) {
double s = scanner.nextDouble();
// Circle和Square是需要你定义的类
System.out.println(String.format("%.3f",new Circle(s).getArea()));
System.out.println(String.format("%.3f", new Square(s).getArea()));
}
}
}
class Shape {
private double s; // 周长
public Shape(double s) {
this.s = s;
}
public double getS() {
return s;
}
}
interface Area {
double getArea(); // 面积
}
// 圆形
class Circle extends Shape implements Area {
//write your code here......
public Circle(double s) {
super(s);
}
@Override
public double getArea() {
return Math.PI * Math.pow((getS() / (2 * Math.PI)), 2);
}
}
// 方形
class Square extends Shape implements Area {
//write your code here......
public Square(double s) {
super(s);
}
@Override
public double getArea() {
return Math.pow((getS() / 4), 2);
}
}
Java 解法, 执行用时: 40ms, 内存消耗: 12504KB, 提交时间: 2021-10-17
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextDouble()) {
double s = scanner.nextDouble();
// Circle和Square是需要你定义的类
System.out.println(String.format("%.3f",new Circle(s).getArea()));
System.out.println(String.format("%.3f", new Square(s).getArea()));
}
}
}
class Shape {
private double s; // 周长
public Shape(double s) {
this.s = s;
}
public double getS() {
return s;
}
}
interface Area {
double getArea(); // 面积
}
// 圆形
class Circle extends Shape implements Area {
public Circle(double s){
super(s);
}
public double getArea(){
//周长=2πr 则 r=周长/2π
double r = getS()/(2*Math.PI);
return Math.PI * r * r;
}
}
// 方形
class Square extends Shape implements Area {
public Square(double s){
super(s);
}
public double getArea(){
return Math.pow(getS() / 4,2);
}
}
Java 解法, 执行用时: 40ms, 内存消耗: 12584KB, 提交时间: 2021-11-13
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
while(scanner.hasNextDouble()){
double s=scanner.nextDouble();
System.out.println(String.format("%.3f",new Circle(s).getArea()));
System.out.println(String.format("%.3f",new Square(s).getArea()));
}
}
}
class Shape{
private double s;
public Shape(double s){
this.s=s;
}
public double getS(){
return s;
}
}
interface Area{
double getArea();
}
class Circle extends Shape implements Area{
public Circle(double s){
super(s);
}
@Override
public double getArea(){
return Math.PI*Math.pow(getS()/(2*Math.PI),2);
}
}
class Square extends Shape implements Area{
public Square(double s){
super(s);
}
@Override
public double getArea(){
return Math.pow(getS()/4,2);
}
}
Java 解法, 执行用时: 40ms, 内存消耗: 12688KB, 提交时间: 2021-11-21
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextDouble()) {
double s = scanner.nextDouble();
// Circle和Square是需要你定义的类
System.out.println(String.format("%.3f",new Circle(s).getArea()));
System.out.println(String.format("%.3f", new Square(s).getArea()));
}
}
}
class Shape {
private double s; // 周长
public Shape(double s) {
this.s = s;
}
public double getS() {
return s;
}
}
interface Area {
double getArea(); // 面积
}
// 圆形
class Circle extends Shape implements Area {
//write your code here......
public Circle(double s){
super(s);
}
public double getArea(){
return Math.pow(getS()/(2*Math.PI),2)*Math.PI;
}
}
// 方形
class Square extends Shape implements Area {
//write your code here......
public Square(double s){
super(s);
}
public double getArea(){
return Math.pow(getS()/4,2);
}
}