java - 如何查看我有多少抽奖结果并显示它？

Question

下面我们有 2 个 int 数组存储主客场的足球结果...我需要显示我有多少平局结果的统计数据。有人可以帮助我吗？我无法弄清楚。请假设它这是我的第一个程序，如果您有任何解决方案，请评论代码。我需要向我的导师解释我是如何做到的。谢谢

    String[] HomeTeam = new String[10];
    String[] AwayTeam = new String[10];
    int[] HomeScore = new int[10];
    int[] AwayScore = new int[10];

    int index = 0;
    int sum = 0;
    int sum1 = 0;

    do 
    {
        System.out.print("Enter Home Team Name: ");
        HomeTeam[index] = kbd.nextLine();
        System.out.print("Enter Away Team Name: ");
        AwayTeam[index] = kbd.nextLine();
        System.out.print("Enter Home Team Score:");
        HomeScore[index] = kbd.nextInt();
        System.out.print("Enter Away Team Score: ");
        AwayScore[index] = kbd.nextInt();
        kbd.nextLine();


    } while(index < 10);
    index = 0;

    System.out.println();   

    do 
    {
        System.out.println(HomeTeam[index] + " [" + HomeScore[index] + "]" + " | " + AwayTeam[index] + " [" + AwayScore[index] + "] ");
        index = index + 1;

    } while(index < 10);

    kbd.close();

    for(index = 0; index < 10; index++)
        sum += HomeScore[index];
        for(index = 0; index < 10; index++)
            sum1 += AwayScore[index];

    System.out.println();
    System.out.println("Totals");
    System.out.println("-------------------------------");
    System.out.println("Total number of matches played: " + index);
    System.out.println("Total of all home scores: " + sum);
    System.out.println("Total of all away scores: " + sum1);
    System.out.println("Total number of draws: ");
    System.out.println("The highest home score: ");
    System.out.println("The highest away score: ");

}

}

Answer 1

为了编写代码，您必须清楚您正在实现的解决方案。一个好的初学者练习是写一个程序执行的流程图(在键盘之前写纸)。

我做了一个供您将来引用:

因此，考虑到该算法，我实现了一个可能的解决方案(使用硬编码数据)。

主类:

public class MainE {

    public static void main(String[] args) {

        String[] homeTeam = { "q", "w", "e", "r", "t", "y", "u", "i", "o", "p"};
        String[] awayTeam = {"p", "o", "i", "u", "y", "t", "r", "e", "w", "q"};
        int[] homeScore = {5,1,3,5,6,1,10,4,3,2};
        int[] awayScore = {4,3,2,1,3,5,42,1,3,2};

        int sumHome = 0;
        int sumAway = 0;
        int drawCount = 0;

        int highestHomeScore = homeScore[0];
        int highestAwayScore = awayScore[0];

        System.out.println();

        for (int index = 0; index < 10; index++) {

            System.out.println(homeTeam[index] + " [" + homeScore[index] + "]"
                    + " | " + awayTeam[index] + " [" + awayScore[index] + "] ");
            sumHome += homeScore[index];
            sumAway += awayScore[index];

            if (homeScore[index] > highestHomeScore) highestHomeScore = homeScore[index];
            if (awayScore[index] > highestAwayScore) highestAwayScore = awayScore[index];

            if(homeScore[index] == awayScore[index]) drawCount++;
        }



        System.out.println();
        System.out.println("Totals");
        System.out.println("-------------------------------");
        System.out.println("Total number of matches played: " + homeTeam.length);
        System.out.println("Total of all home scores: " + sumHome);
        System.out.println("Total of all away scores: " + sumAway);
        System.out.println("Total number of draws: " + drawCount);
        System.out.println("The highest home score: " + highestHomeScore);
        System.out.println("The highest away score: " + highestAwayScore);

    }

}

输出:

q [5] | p [4] 
w [1] | o [3] 
e [3] | i [2] 
r [5] | u [1] 
t [6] | y [3] 
y [1] | t [5] 
u [10] | r [42] 
i [4] | e [1] 
o [3] | w [3] 
p [2] | q [2] 

Totals
-------------------------------
Total number of matches played: 10
Total of all home scores: 40
Total of all away scores: 66
Total number of draws: 2
The highest home score: 10
The highest away score: 42

<小时/>

编辑:

如果你想避免 null 值，你必须在每次迭代时询问 if(homeTeam[index] != null )，还要手动计算匹配数(它们不再匹配数组长度)

处理空值

public class MainE {

    public static void main(String[] args) {

        String[] homeTeam = { "q", "w", "e", null, "t", "y", "u", "i", "o", "p"};
        String[] awayTeam = {"p", "o", "i", null, "y", "t", "r", "e", "w", "q"};
        int[] homeScore = {5,1,3,0,6,1,10,4,3,2};
        int[] awayScore = {4,3,2,0,3,5,42,1,3,2};

        int sumHome = 0;
        int sumAway = 0;
        int drawCount = 0;
        int matches = 0;

        int highestHomeScore = homeScore[0];
        int highestAwayScore = awayScore[0];

        System.out.println();

        for (int index = 0; index < 10; index++) {
            if(homeTeam[index] != null ){
                System.out.println(homeTeam[index] + " [" + homeScore[index] + "]"
                        + " | " + awayTeam[index] + " [" + awayScore[index] + "] ");
                sumHome += homeScore[index];
                sumAway += awayScore[index];

                if (homeScore[index] > highestHomeScore) highestHomeScore = homeScore[index];
                if (awayScore[index] > highestAwayScore) highestAwayScore = awayScore[index];

                if(homeScore[index] == awayScore[index]) drawCount++;
                matches++;
            }


        }



        System.out.println();
        System.out.println("Totals");
        System.out.println("-------------------------------");
        System.out.println("Total number of matches played: " + matches);
        System.out.println("Total of all home scores: " + sumHome);
        System.out.println("Total of all away scores: " + sumAway);
        System.out.println("Total number of draws: " + drawCount);
        System.out.println("The highest home score: " + highestHomeScore);
        System.out.println("The highest away score: " + highestAwayScore);

    }

}

输出:

q [5] | p [4] 
w [1] | o [3] 
e [3] | i [2] 
t [6] | y [3] 
y [1] | t [5] 
u [10] | r [42] 
i [4] | e [1] 
o [3] | w [3] 
p [2] | q [2] 

Totals
-------------------------------
Total number of matches played: 9
Total of all home scores: 35
Total of all away scores: 65
Total number of draws: 2
The highest home score: 10
The highest away score: 42

注意:更好的选择是在询问输入时跳过空值。