如何使用切换条件下的百分比来表示基于健康的玩家状态？

Question

在此之前，我应该说，我对编程和Java总体来说是非常陌生的；请原谅我的愚蠢！我正在尝试为玩家设置一个基于他们的健康程度的状态系统，其中他们的当前状态是一个切换函数中涉及的字符串，该字符串从"You are doing fine!“变成“你快死了！”然而，不是用个位数，我想用健康百分比来做，这样当他们达到50%或25%的生命值时，消息就不会改变，无论玩家的最大生命值是50%还是10%。

本质上，我想让它取代开关函数中代表某些健康值的单变量，即PCHealth的百分比。这是我不想要的，但我知道该怎么做：

int PCHealth = 10;
String Status = "";
switch (PCHealth) {
  case 5: Status = "You're fine!";
  case 2: Status = "You're dying!";
}

下面是我想要用假代码勾勒出来的东西：

int PCHealth = 10;
String Status = "';
switch (PCHealth) {
  case [50% of PCHealth] = "You're fine!";
  case [20 % of PCHealth] = "You're dying!";
}

谢谢!

Answer 1

/*

Things that you will need to know
- integer division vs double
- type casting
- Math.ceil()

# int division

10/25 --> 0

# double division

10.0/25 --> 0.4

# Math.ceil()

Math.ceil(0.4) --> 1.0



0-25 XXX
25-50 fine
50-75 good
75-100 great

*/

试着使用这段代码，打印出你不理解的东西或他们持有的价值...我试着让事情变得简单。

public class MyClass {

    private static int maxHealth = 100;
    public static String getPlayerHealthStatus(double pHealth){

        String pHStatus = "";
        int pHealth_case = (int) Math.ceil( pHealth / (maxHealth / 4));

        switch (pHealth_case) {
            case 4:
                pHStatus = "You're doing great!"; 
                break;

            case 3:
                pHStatus = "You're doing good!";
                break;

            case 2:
                pHStatus = "You're fine!";
                break;

            case 1:
                pHStatus = "You're dying!";
                break;

            case 0:
                pHStatus = "You died!";
                break;

            default:
                pHStatus = "invalid player health";
        }

        return pHStatus;
    }

    public static void main(String args[]) {
        int playerHealth = 90;
        System.out.println("player health: "+playerHealth+" status: "+getPlayerHealthStatus(playerHealth));

        playerHealth = 70;
        System.out.println("player health: "+playerHealth+" status: "+getPlayerHealthStatus(playerHealth));

        playerHealth = 40;
        System.out.println("player health: "+playerHealth+" status: "+getPlayerHealthStatus(playerHealth));

        playerHealth = 20;
        System.out.println("player health: "+playerHealth+" status: "+getPlayerHealthStatus(playerHealth));

        playerHealth = 0;
        System.out.println("player health: "+playerHealth+" status: "+getPlayerHealthStatus(playerHealth));
    }
}

输出：

player health: 90 status: You're doing great!
player health: 70 status: You're doing good!
player health: 40 status: You're fine!
player health: 20 status: You're dying!
player health: 0 status: You died!

Answer 2

只要用if-else就行了。它很简单，也很容易理解。

public String getStatus(int PChealth, int maxValue) {
    float percent = (PChealth * 1.0f) / maxValue;

    if (percent > 75) return "great";
    else if (percent > 50) return "mid";
    else if (percent > 25) return "not good";
    else if (PChealth == 0) return "dead";
    else return "bad";
}

附注:对true求值的第一个if将返回正确的值。

懂吗？

Answer 3

我会将最大健康值存储在变量MaxHealth中，然后尝试以下开关！:)

在这里，我们在switch语句中有if语句，如果运行状况在0到20%之间，它将执行情况1，依此类推

double PCHealth = __ ;

switch (((0 <= PCHealth && PCHealth <= (0.2 * MaxHealth)) ? 0 : 
        ((0.2 * MaxHealth) > PCHealth && (0.5 * MaxHealth) < PCHealth) ? 1 : 2)
  {

    case 0:
        Status = "You're dying!";
        break;
    case 1:
        Status = "You're fine!";
        break;
    case 2:
        Status = "You're doing excelent";
        break;
}