Java:计算总数并将其存储在变量中

Question

我被要求计算今天预计参加比赛的高尔夫俱乐部成员(member)总数(总数乘以小数百分比)并将该总数存储在球员变量中。我不知道如何存储总数。任何帮助都会很棒。我尝试使用 if 语句然后输入 players = input.nextDouble(); 但这不起作用。我对 Java 很陌生......

 class golf
 {
     private int weather;
     private double val1;
     private double players;

     public void calculations()
     {            
         Scanner input = new Scanner(System.in);
         System.out.print("Enter the number of club members: "); 
         val1 = input.nextDouble();

         System.out.println("Now select a number for the weather");   //weather atm
         System.out.println("1: Sunny");
         System.out.println("2: Overcast");
         System.out.println("3: Rain");
         System.out.print("Selection: ");
         weather = input.nextInt();

         System.out.println(" ");
    }

    public void output()
    {
        if (weather == 1) //calculates expected players when Sunny
            System.out.println(val1*.25 + " " + "will play golf today!");

        if (weather == 2) //calculates expected players when Overcast
            System.out.println(val1*.12 + " " + "will play golf today!"); 

        if (weather == 3) //calculates expected players when Rainy
            System.out.println(val1*.03 + " " + "will play golf today!"); 
    }
}

Answer 1

这是你需要的吗？

public void output() {
    if (weather == 1) {
        players = 0.25 * val1;
    }

    if (weather == 2) {
        players = 0.12 * val1;
    }

    if (weather == 3) {
        players = 0.03 * val1;
    }

    System.out.println(players + " will play golf today!");
}