Java新手，尝试编写基本程序，但遇到问题[重复]

Question

我试图创建一个基本的计算程序，使用用户输入（几乎是我自己的）和处理非常小的计算。不过，我似乎无法让计算返回。我在这个文件中完成所有的计算：

public class Drug {

private double goalForQuarter = 3716.0;
private double currentScripts;
private double currentDaysIntoQuarter;
private double scriptsNeededDaily100 = goalForQuarter / currentDaysIntoQuarter;
private double scriptsNeededDaily105 = scriptsNeededDaily100 * 1.05;
private double scriptPercentage = currentScripts / scriptsNeededDaily100;


public Drug () {

}

public Drug (double currentScripts) {
    this.currentScripts = currentScripts;
}

public Drug (double currentScripts, double currentDays){
    this.currentScripts = currentScripts;
    this.currentDaysIntoQuarter = currentDays;
}

public double calcDrug100 (){

    return this.scriptPercentage;
}


}

这个主程序在这里运行：

导入java。util。扫描仪；

public class Main {

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

        System.out.print("Input number of days into Quarter: ");
        double days = Integer.parseInt(reader.nextLine());
        System.out.println("Input current number of Scripts: ");
        double scripts = Integer.parseInt(reader.nextLine());


        Drug drug1 = new Drug(scripts, days);

        System.out.println(drug1.calcDrug100());

    }

}

即使有用户输入，我也会打印出0.0。我一直在玩弄我的变量和方法，但似乎无法让它发挥作用。任何帮助都将不胜感激！

Answer 1

scriptPercentage是一个字段。当currentScripts或ScriptsNeedDaily100执行时，它不会自动更新。

public double calcDrug100 (){
    this.scriptPercentage = this.currentScripts / this.scriptsNeededDaily100;
    return this.scriptPercentage;
}