作业五 5.2 5.3

一.代码源

package aaa;
import java.text.DecimalFormat;
import java.util.Scanner;
public class Dada {

	public static void main(String[] args) {
		int condition=1 ;
		Dada dada = new Dada();
		Scanner scanner = new Scanner(System.in);
		while(condition==1){
		System.out.print("请输入第一个数：");
		double x = scanner.nextDouble();
		System.out.print("请输入第二个数：");
		double y = scanner.nextDouble();
		System.out.print("请输入运算符：");
		String s = scanner.next();
		char z = s.charAt(0);
		Test test=new Test();
		test.yunsuan(x, y, z);
		System.out.print("是否继续？1是  其他为否");
		condition = scanner.nextInt();}
		}
	}

package aaa;

import java.text.DecimalFormat;
public class Test{
public static int yunsuan(double x,double y,Character z){
		DecimalFormat r=new DecimalFormat();
		if(z.equals(‘+‘)){
			System.out.println(x+"+"+y+"=" + r.format((x+y)));
		}
		return 1;
		}
public static int yunsuan1(double x,double y,Character z){
	DecimalFormat r=new DecimalFormat();
	if(z.equals(‘-‘)){
		System.out.println(x+"-"+y+"=" + r.format((x-y)));}
	return 1;}
public static int yunsuan2(double x,double y,Character z){
	DecimalFormat r=new DecimalFormat();
	 if(z.equals(‘*‘)){
			System.out.println(x+"*"+y+"=" + r.format((x*y)));
		}return 1;}
public static int yunsuan3(double x,double y,Character z){
	DecimalFormat r=new DecimalFormat();
	if(z.equals(‘/‘)){
		if(y==0){
			System.out.println("被除数不能为0");
		} else{
			System.out.println(x+"/"+y+"=" + r.format((x/y)));
		}

		}
	return 1;

	}
}

　二.测试结果

三.感想

基础太差了，实力跟不上想法，虽然现在在努力的解决实力问题，可却不是短时间内可以改变的，所以老师的要求基本都没有怎么实现，但之后我一定会补交一份完整的作业！