Question

这是整个项目，它应该尽我所能，但我希望在这里发布它可以让我看到我错过的东西，我有适度的java经验

package com.company;

import java.util.Random;
import java.util.Scanner;

public class Main {

public static void main(String[] args) {
// write your code here
    Scanner input = new Scanner(System.in);

    int number1;
    int number2;
    int answer;
    String operator;

这表明用户想要的数字和运营商

 System.out.println("Please Enter your first number");
        number1 = input.nextInt();
        System.out.println("Please enter your second number");
        number2 = input.nextInt();
        System.out.println("Please enter your operator: + , - , * , / ");
            operator = input.next();

if语句应该确定用户想要哪个运算符并将其应用于这两个数字，然后调用randomEquation方法使其成为错误的答案

           if (operator == "+") {
                answer = number1 + number2;
                System.out.println("Your answer is: " + randomEquation(answer));
            } else if (operator == "-") {
                answer = number1 - number2;
                System.out.println("Your answer is: " + randomEquation(answer));
            } else if (operator == "*") {
                answer = number1 * number2;
                System.out.println("Your answer is: " + randomEquation(answer));
            } else if (operator == "/") {
                answer = number1 / number2;
                System.out.println("Your answer is: " + randomEquation(answer));
            }



}

此方法随机将其中一个应用于答案以创建错误的答案

  public static int randomEquation(int number) {
    Random rand = new Random();
    int random = rand.nextInt(100) + 1;
    int answer = number;
    if (random <= 100 && random >= 81) {
        answer = number * 25;
        return answer;
    }
    else if(random <= 80 && random >= 61){
        answer += 13;
        return answer;
    }
    else if(random <= 60 && random >= 41){
        answer /= 2;
        return answer;
    }
    else if(random <= 40 && random >= 21){
        answer -= 16;
        return answer;
    }
    else{
        answer %= 4;
        return answer;
    }
   }
  }

Answer 1

你需要在字符串中使用.equals。

而不是：

operator == "+"

尝试：

"+".equals(operator)

Java代码不会打印出答案或正确读取int

1 个答案: