資本/州猜游戲2D陣列

Question

我一直在網上尋找，發現有一些人能夠完成這種代碼，但沒有人為我直接看到的問題提供解決方案。 此處的任務是讓程序詢問用戶“亞利桑那州的首都是什么”。 用戶需要輸入諸如Phoenix之類的大寫字母，它會獎勵一個分數並一直移至下一個問題，同時計算正確答案的數量，並在完成后將其顯示在輸出的底部。 運行我的程序時，它詢問列表中第一個狀態的首字母。 一旦完成，它將提供一個要點，但隨后吐出其余狀態，說它們是正確的，但不會使用戶有機會進入下一個狀態。 好像我錯過了當第一個州被回答時會回到原始問題“輸入所列州的首都”的部分一樣。有人可以提供幫助嗎？ 我相信我需要一個類似if，if，if和else的語句，但是看不到如何在這里應用它，或者是否應該嘗試另一個循環。 我無法執行do循環以正常工作。 有什么建議么？ 我的代碼如下。

import java.util.Scanner;


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

       int correctStates = 0;
       String userInput = "";
       int i = 0;
       final int NUMBER_OF_US_STATES = 49;

       String capitals [][] = {
        {"Alabama", "Montgomery"},
        {"Alaska", "Juneau"},
        {"Arizona", "Phoenix"},
        {"Arkansas", "Little Rock"},
        {"California", "Sacramento"},
        {"Colorado", "Denver"},
        {"Connecticut", "Hartford"},
        {"Delaware", "Dover"},
        {"Florida", "Tallahasse"},
        {"Georgia", "Atlanta"},
        {"Hawaii", "Honolulu"},
        {"Idaho", "Boise"},
        {"Illinois", "Springfield"},
        {"Indiana", "Indianapolis"},
        {"Iowa", "Des Moines"},
        {"Kansas", "Topeka"},
        {"Kentucky", "Frankfort"},
        {"Louisiana", "Baton Rouge"},
        {"Maine", "Augusta"},
        {"Maryland", "Annapolis"},
        {"Massachusettes", "Boston"},
        {"Michigan", "Lansing"},
        {"Minnesota", "Saint Paul"},
        {"Mississippi", "Jackson"},
        {"Missouri", "Jefferson City"},
        {"Montana", "Helena"},
        {"Nebraska", "Lincoln"},
        {"Nevada", "Carson City"},
        {"New Hampshire", "Concord"},
        {"New Jersey", "Trenton"},
        {"New York", "Albany"},
        {"New Mexico", "Santa Fe"},
        {"North Carolina", "Raleigh"},
        {"North Dakota", "Bismark"},
        {"Ohio", "Columbus"},
        {"Oklahoma", "Oklahoma City"},
        {"Oregon", "Salem"},
        {"Pennslyvania", "Harrisburg"},
        {"Rhode Island", "Providence"},
        {"South Carolina", "Columbia"},
        {"South Dakota", "Pierre"},
        {"Tennessee", "Nashville"},
        {"Texas", "Austin"},
        {"Utah", "Salt Lake City"},
        {"Vermont", "Montpelier"},
        {"Virginia", "Richmond"},
        {"Washington", "Olympia"},
        {"West Virginia", "Charleston"},
        {"Wisconsin", "Madison"},
        {"Wyoming", "Cheyenne"}
       };

       System.out.println("Enter the Capital of the State listed: " + capitals[i][0]);
       userInput = scnr.next();

       i = 0;
       for(i = 0; i <= NUMBER_OF_US_STATES; i++){      
       if(capitals[i][1].equals(userInput)) {
           correctStates++;
           System.out.println("Yes that is the capital of " + capitals[i][0] + ".");

       }

       else {
           System.out.println("No that is not the capital of " + capitals[i][0] + ".");
           i++;
       }
       }


       //counts the number of correct guesses.
       System.out.println("Total number of capitals answered correctly: " + correctStates + ".");
       i++;


     return;

   }
}

Answer 1

您必須將問題和輸入移動到for循環內，您只要求輸入一次，如果正確，則它將打印所有正確的內容，或者以其他方式輸出。 下面的兩行應位於for循環內。

System.out.println("Enter the Capital of the State listed: " + capitals[i][0]);
userInput = scnr.next();

我認為有50個州（不是49個州）？ 另外，如果更改為50，則條件應為< NUMBER_OF_STATES而不是<=，否則您將擁有ArrayIndexOutOfBounds。