java - Java 中的数据成员(字段)并打印出来时出现问题？如何正确实现？

Question

我想在 printReport() 中打印出 calcWork() 的结果，但我一直得到 0.0 设置 work = this.totalWork; 是否有问题？

public class CarnotEngine {
  public double n = 10;
  public double R = 4;
  public double Th = 8;
  public double Tc =2;
  public double Va = 4;
  public double Vb = 3;
  public double totalWork;
  public double highTemp, lowTemp;
  public double efficientcy;


public CarnotEngine(double highTemp, double lowTemp ){
    this.highTemp = highTemp;
    this.lowTemp = lowTemp;
}



public double calcWork(){
    double Qh;
    double work;
    Qh = (n*R*highTemp)*log(Vb/Va);
    work =(1-lowTemp/highTemp)*Qh;
    work = this.totalWork;
    return work;


}

    public void printReport() {
    System.out.println("Simulation Result for Carnot Engine");
    System.out.println("work done" + totalWork );

    public static void main(String[] args) {
         CarnotEngine carengine = new  CarnotEngine(500, 200);
     carengine.calcWork();
     carengine.calcEfficientcy();
     carengine.printReport();


   }
}   

Answer 1

你的作业是倒退的:

work = this.totalWork;

应该是

this.totalWork = work;

现在的方式是计算 work 中的所有内容，并立即用 this.totalWork 中的值覆盖它。