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Monday, 29 August 2016

Chapter 8 Exercise 37, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

8.37 (Guess the capitals) Write a program that repeatedly prompts the user to enter
a capital for a state. Upon receiving the user input, the program reports whether
the answer is correct. Assume that 50 states and their capitals are stored in a two-
dimensional array, as shown in Figure 8.10. The program prompts the user to
answer all states’ capitals and displays the total correct count. The user’s answer
is not case-sensitive.
Alabama
Alaska
Arizona
...
...
Montgomery
Juneau
Phoenix
...
...
F IGURE 8.10 A two-dimensional array stores states and their capitals.
Here is a sample run:
What is the
The correct
What is the
Your answer
What is the
...
The correct
capital of Alabama? Montogomery
answer should be Montgomery
capital of Alaska? Juneau
is correct
capital of Arizona? ...
count is 35


import java.util.Scanner;

public class Exercise_37 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int correctCount = 0;
        for (int i = 0; i < stateCapitals.length; i++) {
            System.out.print("What is the capital of " + stateCapitals[i][0]+"? ");
            String s = input.nextLine();
            if (s.equalsIgnoreCase(stateCapitals[i][1])) {
                System.out.println("Your answer is correct!");
                correctCount++;
            } else {
                System.out.println("WRONG - The correct answer is " + stateCapitals[i][1]);
            }
        }
        System.out.println("The correct count is " + correctCount);
    }

    private static String[][] stateCapitals = {
                    {"Alabama", "Montgomery"},
                    {"Alaska", "Juneau"},
                    {"Arizona", "Phoenix"},
                    {"Arkansas", "Little Rock"},
                    {"California", "Sacramento"},
                    {"Colorado", "Denver"},
                    {"Connecticut", "Hartford"},
                    {"Delaware", "Dover"},
                    {"Florida", "Tallahassee"},
                    {"Georgia", "Atlanta"},
                    {"Hawaii", "Honolulu"},
                    {"Idaho", "Boise"},
                    {"Illinois", "Springfield"},
                    {"Maryland", "Annapolis"},
                    {"Minnesota", "Saint Paul"},
                    {"Iowa", "Des Moines"},
                    {"Maine", "Augusta"},
                    {"Kentucky", "Frankfort"},
                    {"Indiana", "Indianapolis"},
                    {"Kansas", "Topeka"},
                    {"Louisiana", "Baton Rouge"},
                    {"Oregon", "Salem"},
                    {"Oklahoma", "Oklahoma City"},
                    {"Ohio", "Columbus"},
                    {"North Dakota", "Bismark"},
                    {"New York", "Albany"},
                    {"New Mexico", "Santa Fe"},
                    {"New Jersey", "Trenton"},
                    {"New Hampshire", "Concord"},
                    {"Nevada", "Carson City"},
                    {"Nebraska", "Lincoln"},
                    {"Montana", "Helena"},
                    {"North Carolina", "Raleigh"},
                    {"Missouri", "Jefferson City"},
                    {"Mississippi", "Jackson"},
                    {"Massachusetts", "Boston"},
                    {"Michigan", "Lansing"},
                    {"Pennsylvania", "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"}
            };
}

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