Question

我正在做一个数学测验游戏，我不确定如何循环播放，比如说50次。仅回答2个问题即可结束。我也想增加生活，所以当您遇到三个错误的问题后，该程序就会结束。我该怎么做？

    import java.util.Scanner;

public class Game {

    public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);



    int Number1 =  (int)(20 * Math.random()) + 1;
    int Number2 =  (int)(20 * Math.random()) + 1;

    int correct = 0;


    System.out.print(Number1 + " + " + Number2 + " = ");
    int GuessRandomNumberAdd = keyboard.nextInt();

    if (GuessRandomNumberAdd == Number1 + Number2) {
    System.out.println("Correct!");
    correct++;
  }else {
    System.out.println("Wrong!");


  }
    System.out.print(Number1 + " * " + Number2 + " = ");    
    int GuessRandomNumberMul = keyboard.nextInt();

  if (GuessRandomNumberMul == Number1 * Number2) {
      System.out.println("Correct!");
      correct++;
  }else{
        System.out.println("Wrong!");




System.out.println("You got " + correct + " correct answers.");

Answer 1

int正确后= 0; 添加一个生命计数器。例如： int生命= 3; 然后开始一会儿循环 while（寿命> 0）{

如果问题不正确，请减少生命（在此处输入“ wrong！”消息）生活-;

在while循环结束时

（在没有打印出正确答案之前）记得放在最后一个}

这将一直循环播放，直到您失去生命

Answer 2

几件事： -有多个Java结构可让您循环。任何一种编程语言中的主要循环都是for循环，while循环和do-while循环（不常见） -您可以通过定义变量并在每次迭代中进行检查来创建生命（每次迭代都是通过循环代码“运行”）。

实现这两项之后，您的代码将如下所示：

    import java.util.Scanner;

public class Game {

    public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);

    int Number1 =  (int)(20 * Math.random()) + 1;
    int Number2 =  (int)(20 * Math.random()) + 1;

    int correct = 0;
    int lives = 3;
    //The for loop is read as: having i equal 25 and the variable lives, iterate if i is lower than 25 AND lives is higher than 0. After an iteration, add 1 to i;
    for (int i=25, lives; i<25 && lives > 0; i++) {

    System.out.print(Number1 + " + " + Number2 + " = ");
    int GuessRandomNumberAdd = keyboard.nextInt();

    if (GuessRandomNumberAdd == Number1 + Number2) {
    System.out.println("Correct!");
    correct++;
  } else {
    System.out.println("Wrong!");
    lives--;
  }
    System.out.print(Number1 + " * " + Number2 + " = ");    
    int GuessRandomNumberMul = keyboard.nextInt();

  if (GuessRandomNumberMul == Number1 * Number2) {
      System.out.println("Correct!");
      correct++;
  }else{
        System.out.println("Wrong!");
        lives--;
  } //Forgot this bracket
} //Closes the for loop



System.out.println("You got " + correct + " correct answers.");

Answer 3

查看以下示例是否按预期工作。在这里，我将循环计数设为5。因此，将有5个“加法”问题和5个“乘法”问题。

我也在打印问题编号。因此，现在的输出更加清晰。

df.tail()
125  126             Louisiana         Sun Belt   5   7   .417
126  127      Louisiana-Monroe         Sun Belt   4   8   .333
127  128                 Idaho         Sun Belt   4   8   .333
128  129         South Alabama         Sun Belt   4   8   .333
129  130           Texas State         Sun Belt   2  10   .167

Java如何循环测试一定次数并增加生命

3 个答案: