Java支架問題

Question

我認爲我在某處丟失了括號，但我一直在搜索3個小時，找不到錯誤，也沒有Google搜索幫助我。

我試圖添加結束括號/括號到if語句，但然後我得到了一堆錯誤。一旦有人發現我做了什麼，可能會是一個「唔」的時刻..在此先感謝。

錯誤： NumberGame.java:45：錯誤：文件的最終達成在分析 } ^ NumberGame.java:51：錯誤：文件的最終達成在分析 2個錯誤

import java.util.*; 

public class NumberGame 
{ 
    public static void main(String[] args) 
    { 
     double R = 0; 
     double tryit = 0; 
     double a = 0; 
     double b = 0; 
     while (tryit == 0) 
     { 
      R = 0; 
      while (R != 1) 
      { 
       a = (int)(Math.Random() * 10); 
       b = (int)(Math.Random() * 10); 
       if (a -b >= 0){ 
        R = 1; 
      } 
     } 
     double inpt = -7; 
      while (inpt != (a-b)) 
      { 
       Sytem.out.println("What is " + a + " minus " + b + " ? "); 

       inpt = scanner.inpt = new Scanner(System.in); 

       if ((a -b) == inpt){ 
        System.out.print("Good job, you are correct"); 
        System.out.println("Play again?, Yes or No?:"); 
        String inpt2 = scanner.inpt2 = new Scanner(System.in); 
       if ((a-b) != inpt){ 
        System.out.println("Sorry try again"); 

      } 
     if (inpt2 == "No"){ 
      System.out.println("Thanks for playing"); 
      break; 
     if (inpt2 == "no"){ 
      System.out.println("Thanks for playing"); 
      break; 
    } 
} 

Answer 1

您的if語句需要右括號：

if (a -b >= 0){ 
    R = 1; 
} 

Answer 2

您的if語句需要右括號。

if (a -b >= 0){ 
     R = 1; 
    } // Closing bracket 

    .... 

    if ((a -b) == inpt) { 
     System.out.print("Good job, you are correct"); 
     System.out.println("Play again?, Yes or No?:"); 
     String inpt2 = scanner.inpt2 = new Scanner(System.in); 
    } // Closing bracket 
    if ((a-b) != inpt){ 
     System.out.println("Sorry try again"); 
    } // Closing bracket 

    ... 

    // I think you only need one of these and not two 
    if (inpt2 == "No"){ 
     System.out.println("Thanks for playing"); 
     break; 
    } // Closing bracket 
    if (inpt2 == "no"){ 
     System.out.println("Thanks for playing"); 
     break; 
    } // Closing bracket 

Answer 3

每if語句左括號，但沒有關閉一個