ii

package chap2;import java.util. Scanner;public class Exam2_ _8 { publicstatic void main(String[ args){ Scanner sC = newScanner(System.in); System.out.println("请输入矩形的长: "); double a = sc.nextDouble(); System.out.println("请输入矩形的宽: "); doubleb = sc.nextDouble(); double ZC = 2*(a+b); doublemj= a * b; System.out.printIn("矩形的周长 是"+zc); System.out.println("矩形的面积是"+mj);