1 package tools; 2  3 import java.util.Random; 4 import java.util.Scanner; 5  6 public class problem { 7  8     public static void main(String[] args) { 9         /**10          * 一共循环10次。11          */12         int rightNum = 0;//正确次数13         int wrongNum = 0;//错误次数14         for (int i =1; i <= 10; i++) {15             System.out.println("请计算第" + i + "道题：");// 做到第几题，循环输出16             int number1 =(int) (Math.random() * 10);17             int number2 =(int) (Math.random() * 10);18             Random num = new Random();// 生成随机运算符19             int index = num.nextInt(3) + 1;20             char[] fuhaos = { ‘+‘, ‘-‘, ‘*‘, ‘/‘ };21             String fuhao = String.valueOf(fuhaos[index]);22             Scanner scan = new Scanner(System.in);23             if (fuhao.equals("+")) { // 进行加法运算24                 System.out.println(number1 + "+" + number2 + "=");25                 int input = scan.nextInt();26                 int sum = number1 + number2;27                 if (sum==input) {28                     System.out.println("正确");29                     rightNum++;30                 } else {31                     System.out.println("错误");32                     wrongNum++;33                 }34                 System.out.println("正确答案是:" + sum);35             }else if (fuhao.equals("-")) { // 进行减法运算36                 System.out.println(number1 + "-" + number2 + "=");37                 int input = scan.nextInt();38                 int sum = number1 - number2;39                 if (sum==input) {40                     System.out.println("正确");41                     rightNum++;42                 } else {43                     System.out.println("错误");44                     wrongNum++;45                 }46                 System.out.println("正确答案是:" + sum);47             }else if (fuhao.equals("*")) { // 进行乘法运算48                 System.out.println(number1 + "*" +number2 + "=");49                 int input = scan.nextInt();50                 int sum = number1 * number2;51                 if (sum==input) {52                     System.out.println("正确");53                     rightNum++;54                 } else {55                     System.out.println("错误");56                     wrongNum++;57                 }58                 System.out.println("正确答案是:" + sum);59             }else {                     // 进行除法运算60                 System.out.println(number1 + "/" + number2 + "=");61                 int input = scan.nextInt();62                 int sum = number1 / number2;63                 if (sum==input) {64                     System.out.println("正确");65                     rightNum++;66                 } else {67                     System.out.println("错误");68                     wrongNum++;69                 }70                 System.out.println("正确答案是:" + sum);71             }72         }73         System.out.println("做对" + rightNum + "题");74         System.out.println("做错" + wrongNum + "题");75     }76 }