软件设计目标—健壮性-蒲公英云

软件设计目标—健壮性

import java.io.*;
public class CommandLineCalculator {
    private int accumulatedValue=0;
    public CommandLineCalculator(){
        super();
    }
    private static String getAnInputFromUser()
    {
        try
        {
            BufferedReader b=new BufferedReader(new InputStreamReader(System.in));
            return (b.readLine());
        }catch(IOException e){
            System.out.println(e+"Input taken to be a single blank.");
            return " ";
        }
    }
    public static void main(String[] args){
        System.out.print("请输入数字A：");
        String A= getAnInputFromUser();
        System.out.print("请输入数字B：");
        String B= getAnInputFromUser();
        int amountAdded=0;
        while(!A.equals("stop")&!B.equals("stop"))
        {
            try
            {
                int a=(new Integer(A).intValue());   //不是整数时出错
                int b=(new Integer(B).intValue());   //不是整数时出错
                int c=a/b;   //b=0时出错
                System.out.println("结果是："+c);
            }catch (Exception e){
                System.out.print("Sorry—incorrect entry： Try again.\n");
            }
            System.out.print("请输入数字A：");
            A= getAnInputFromUser();
            System.out.print("请输入数字B：");
            B= getAnInputFromUser();
        }
        System.out.println("Application ends.");
    }
}