Paper rock scissors游戏，也许我的代码中缺少了一些东西。

huangapple
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英文:

Paper rock scissors game, probably something is missing from my code

问题

  1. public class Game {
  2.     public static void main(String[] args) {
  3.         String personPlay; // 用户出的手势，可以是 R、P 或 S
  4.         String computerPlay = ""; // 计算机出的手势，也是 R、P 或 S
  5.         int computerInt; // 随机生成的数字，用来确定计算机的手势
  6.         String response;
  8.         Scanner scan = new Scanner(System.in);
  9.         Random generator = new Random();
  11.         System.out.println("让我们来玩剪刀石头布游戏！\n" + "输入你的选择: \n" + "R = 石头, P = 布, S = 剪刀");
  13.         System.out.println();
  15.         computerInt = generator.nextInt(3);
  17.         if (computerInt == 0)
  18.             computerPlay = "R";
  19.         else if (computerInt == 1)
  20.             computerPlay = "P";
  21.         else if (computerInt == 2)
  22.             computerPlay = "S";
  24.         System.out.println("计算机出: " + computerPlay);
  26.         System.out.print("输入你的选择: ");
  27.         personPlay = scan.next();
  29.         if (personPlay.equals(computerPlay))
  30.             System.out.println("平局!");
  31.         else if (personPlay.equals("R"))
  32.             if (computerPlay.equals("S"))
  33.                 System.out.println("石头砸剪刀! 你赢了!");
  34.         else if (personPlay.equals("S"))
  35.             if (computerPlay.equals("P"))
  36.                 System.out.println("剪刀剪布! 你赢了!");
  37.         else if (personPlay.equals("P"))
  38.             if (computerPlay.equals("R"))
  39.                 System.out.println("布包石头! 你赢了!");
  40.         else if (personPlay.equals("R"))
  41.             if (computerPlay.equals("P"))
  42.                 System.out.println("布包石头! 你输了!");
  43.         else if (personPlay.equals("P"))
  44.             if (computerPlay.equals("S"))
  45.                 System.out.println("剪刀剪布! 你输了!");
  46.         else if (personPlay.equals("S"))
  47.             if (computerPlay.equals("R"))
  48.                 System.out.println("石头砸剪刀! 你输了!");
  49.         else
  50.             System.out.println("无效的输入，请重试!");
  51.     }
  52. }
英文:

I started learning to program in java two/three days ago and decided to try and program a simple rock paper scissors game.
it wont run and i think that i either didn't include some important code or that this whole thing is just garbage.
thanks for help!

  1.     public class Game {
  2. 	public static void main(String[] args) {
  3. 		String personPlay; //User's play; either R, P or S
  4. 		String computerPlay = ""; //Computer's play, R, P or S as well
  5. 		int computerInt; //randomly generated number to etermine computers play
  6. 		String response;
  7. 		
  8. 		Scanner scan = new Scanner(System.in);
  9. 		Random generator = new Random();
  10. 		
  11. 		System.out.prinln("Let's play Rock, Paper, Scissors!\n" + "Enter a move: \n" + "R = Rock, P = Paper, S = Scissors");
  12. 		
  13. 		System.out.println();
  14. 		
  15. 		computerInt = generator.nextInt(
  16. 		
  17. 		
  18. 		if (personPlay.equals(computerPlay))
  19. 			System.out.println("It's a tie!");
  20. 		else if (personPlay.equals("R"))
  21. 			if (computerPlay.equals("S"))
  22. 				System.out.println("Rock crushes Scissors! You win!");
  23. 	    else if (personPlay.equals("S"))
  24. 	        if (computerPlay.equals("P"))
  25. 	            System.out.println("Scissors cut Paper! You win!");
  26. 	   else if (personPlay.equals("P"))
  27. 	        if (computerPlay.equals("R"))
  28.                 System.out.println("Paper wraps Rock! You win!");
  29.         else if (personPlay.equals("R"))
  30.             if (computerPlay.equals("P"))
  31.                 System.out.println("Paper wraps Rock! You lose!");
  32.          else if (personPlay.equals("P"))
  33.             if (computerPlay.equals("S"))
  34.                 System.out.println("Scissors cut Paper! You lose!");
  35.          else if (personPlay.equals("S"))
  36.             if (computerPlay.equals("R"))
  37.                 System.out.println("Rock crushes Scissors! You lose!");
  38.         else    System.out.println("Invalid user imput, please try again!");
  39. 	}
  40. }

答案1

得分: 0

我在你分享的代码中发现了一些错误：

  1. 在语句中，“System.out.prinln("Let's play Rock, Paper, Scissors!\n" + "Enter a move: \n" + "R = Rock, P = Paper, S = Scissors");”，应该是System.out.println()。你有一个拼写错误（在“print”中缺少“t”）。

  2. 你需要初始化变量'personPlay'，以使代码编译通过。必须初始化局部变量，因为它们不会假设默认值。

  3. 缺少语句的关闭括号：'computerInt = generator.nextInt('。

修复这些错误可以让代码编译通过。我建议在每个if、else if或else条件中使用花括号，这样代码会更整洁。另外，嵌套的if-else条件链太长，难以阅读和调试（如果出现任何问题）。尽量从简单的条件开始，然后逐步构建你的逻辑，避免出现这么多的if else条件。

英文:

I see a couple of errors in the code that you have shared :

  1. In the statement "System.out.prinln("Let's play Rock, Paper, Scissors!\n" + "Enter a move: \n" + "R = Rock, P = Paper, S = Scissors");"
    , it should be System.out.println().You have a spelling-error (missing 't' in 'print')

  2. You need to initialize variable 'personPlay' for the code to compile. It is required to initialize local variables as they do not assume a default value.

  3. Missing closing bracket for statement :'computerInt = generator.nextInt('.

Fixing these, would let the code compile .
I would suggest using curly braces with each if, else if or else conditions, that would give the code a neat look. Also , there is a long chain of nested if-else conditions which is hard to read and debug(in case of any issue). Try to start with simple conditions and then build your logic in steps , avoiding these many if else conditions.

答案2

得分: 0

我相信这回答了你的问题：

  1. import java.util.Scanner;
  3. public class Game {
  4.     public static void main(String[] args) {
  5.         String personPlay; // 用户的选择；可以是 R、P 或 S
  6.         String computerPlay = ""; // 电脑的选择，也是 R、P 或 S
  7.         String response;
  9.         Scanner scan = new Scanner(System.in);
  11.         System.out.println("让我们玩剪刀石头布游戏！\n" + "输入一个选项：\n" + "R = 石头, P = 布, S = 剪刀");
  12.         System.out.print("玩家 > ");
  13.         personPlay = scan.nextLine();
  15.         System.out.print("电脑 > ");
  16.         String options[] = {"R", "P", "S"};
  17.         computerPlay = options[(int) (Math.random() * 3)];
  18.         System.out.println(computerPlay);
  20.         if (personPlay.equals(computerPlay)) {
  21.             System.out.println("平局！");
  22.         } else if (personPlay.equals("R")) {
  23.             if (computerPlay.equals("P")) {
  24.                 System.out.println("布包裹石头！你输了！");
  25.             } else if (computerPlay.equals("S")) {
  26.                 System.out.println("石头粉碎剪刀！你赢了！");
  27.             }
  28.         } else if (personPlay.equals("P")) {
  29.             if (computerPlay.equals("R")) {
  30.                 System.out.println("布包裹石头！你赢了！");
  31.             } else if (computerPlay.equals("S")) {
  32.                 System.out.println("剪刀切割布！你输了！");
  33.             }
  34.         } else if (personPlay.equals("S")) {
  35.             if (computerPlay.equals("R")) {
  36.                 System.out.println("石头粉碎剪刀！你输了！");
  37.             } else if (computerPlay.equals("P")) {
  38.                 System.out.println("剪刀切割布！你赢了！");
  39.             }
  40.         } else {
  41.             System.out.println("无效的用户输入，请重试！");
  42.         }
  43.     }
  44. }

你的代码存在一些问题，其中大部分已经被其他用户指出。我只想补充一下你编写的 if/else 语句，有一些分支永远不会被执行。我现在时间有限，如果在阅读这个答案后你仍有疑问，请留下评论，我会尽快回复。

英文:

I believe this answers your question:

  1. import java.util.Scanner;
  2. public class Game {
  3. public static void main(String[] args) {
  4. String personPlay; //User's play; either R, P or S
  5. String computerPlay = ""; //Computer's play, R, P or S as well
  6. String response;
  7. Scanner scan = new Scanner(System.in);
  8. System.out.println("Let's play Rock, Paper, Scissors!\n" + "Enter a move: \n" + "R = Rock, P = Paper, S = Scissors");
  9. System.out.print("Player > ");
  10. personPlay = scan.nextLine();
  11. System.out.print("Computer > ");
  12. String options [] = {"R","P","S"};
  13. computerPlay = options[(int)(Math.random()*3)];
  14. System.out.println(computerPlay);
  15. if (personPlay.equals(computerPlay)) {
  16. System.out.println("It's a tie!");
  17. }
  18. else if (personPlay.equals("R")) {
  19. if (computerPlay.equals("P")) {
  20. System.out.println("Paper wraps Rock! You lose!");
  21. }
  22. else if (computerPlay.equals("S")) {
  23. System.out.println("Rock crushes Scissors! You win!");
  24. }
  25. }
  26. else if (personPlay.equals("P")) {
  27. if (computerPlay.equals("R")) { 
  28. System.out.println("Paper wraps Rock! You win!");
  29. }
  30. else if (computerPlay.equals("S")) {
  31. System.out.println("Scissors cut Paper! You lose!");
  32. }
  33. }
  34. else if (personPlay.equals("S")) {
  35. if (computerPlay.equals("R")) {
  36. System.out.println("Rock crushes Scissors! You lose!");
  37. }
  38. else if (computerPlay.equals("P")) {
  39. System.out.println("Scissors cut Paper! You win!");
  40. }
  41. }
  42. else { System.out.println("Invalid user imput, please try again!"); }
  43. }
  44. }

There were a few problems with your code, most of them already pointed by other users. I'll only add that the way you wrote those if/else statements, it would never enter some of them.
I don't have much time right now but if you still have any doubts after seeing this answer leave a comment and I'll answer ASAP.

huangapple
  • 本文由 发表于 2020年9月10日 16:11:45
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  • java
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