Java实现随机出题，10道10以内加减法计算代码实例

package com.swift;import java.awt.Toolkit;import java.util.Scanner;public class PlusQuiz {  public static void main(String[] args) {    int i=0;    int number1=0,number2=0;    for(;;) {      number1=(int) (Math.random()*10);      number2=(int) (Math.random()*10);      //加法部分      System.out.println("What is "+number1+"+"+number2+"?");      Scanner scan=new Scanner(System.in);      int answer=scan.nextInt();      if(answer==number1+number2) {        System.out.println("√");        Toolkit.getDefaultToolkit().beep();        //System.out.println('/007');              }else {        System.out.println("×");        System.out.println(number1+"+"+number2+" should be "+(number1+number2));      }      //减法部分      if(number1<number2) {        int temp;        temp=number1;        number1=number2;        number2=temp;      }      System.out.println("What is "+number1+"-"+number2+"?");      int answer2=scan.nextInt();      if(answer2==number1-number2) {        System.out.println("√");        for(int time=0;time<6;time++)        Toolkit.getDefaultToolkit().beep();      }else {        System.out.println("×");        System.out.println(number1+"-"+number2+" should be "+(number1-number2));      }      //判断加减法完成次数      i++;      if(i==5) {        break;      }    }  }}