package ruan.jian.gong.cheng;import java.text.DecimalFormat;
import java.util.Random;
import java.util.Scanner;public class FigureOperate {public static void main(String[] args) {int correctNum=0;                    //统计答对的题目个数int wrongNum=0;                        //统计答错的题目个数Scanner scan=new Scanner(System.in);double result;                        //表达式的结果double correctResult;                //表达式的正确结果DecimalFormat df=new DecimalFormat("0.00");//循环输出10道十以内的四则运算for(int i=1;i<=10;i++){double num1=Math.round((double)(Math.random()*10));  //随机生成一个10以内的数字放在运算符的左侧double num2=Math.round((double)(Math.random()*10));  //随机生成一个10以内的数字放在运算符的右侧//随机生成一个运算符Random operate=new Random();int n=operate.nextInt(4);  char [] c={'+','-','*','/'};int ope=(int)c[n];               //获得随机生成的运算符对应的ASSIC值switch(ope){case 43:{        //与加号对应的ASSIC值相等,即当运算符为加号时System.out.print("请计算："+num1+"+"+num2+"=");result=scan.nextDouble();correctResult=num1+num2;if(correctResult==result){System.out.println("计算正确");correctNum++;}else{System.out.println("计算错误");wrongNum++;}break;}case 45:{        //与减号对应的ASSIC值相等,即当运算符为减号时System.out.print("请计算："+num1+"-"+num2+"=");result=scan.nextDouble();correctResult=num1-num2;if(correctResult==result){System.out.println("计算正确");correctNum++;}else{System.out.println("计算错误");wrongNum++;}break;}case 42:{        //与乘号对应的ASSIC值相等,即当运算符为乘号时System.out.print("请计算："+num1+"*"+num2+"=");result=scan.nextDouble();correctResult=num1*num2;if(correctResult==result){System.out.println("计算正确");correctNum++;}else{System.out.println("计算错误");wrongNum++;}break;}case 47:{        //与除号对应的ASSIC值相等,即当运算符为除号时System.out.print("请计算："+num1+"/"+num2+"=");result=scan.nextDouble();correctResult=Double.parseDouble(df.format(num1/num2));if(correctResult==result){System.out.println("计算正确");correctNum++;}else{System.out.println("计算错误");wrongNum++;}break;}}}System.out.println("共答对"+correctNum+"道题");System.out.println("共答对"+wrongNum+"道题");}
}