用于计算净现值的Java代码

Question

我必须写一段代码来计算净现值。

我需要使用数组！

折扣率是10%

项目1的现金流为: 500,300，-200

对于项目2：-300,100,700。

所以我不知道怎么才能让它运行起来。谢谢你的帮助。

public class Netpresenvalue{

    public static void main(String [] args) {
        int [] [] cashflows = new int [] [] {{500, 300, -200}, {-300, 100, 700}};
        String [] projects = new String [] {"Project 1", "Project 2"};
        double [] netpv = npv (cashflows);
        report  (netpv, projects, cashflows);
    }

    public static double [] kapwert (int [] [] data) {
        double [] cap = new double [data[0].length];
        for (int i=0 ; i<data[0].length; i++) { 
            cap [i] = cashflows/Math.pow((data[0][i]));
        }
        return cap;
    }

    public static void report (double [] npv, String [] projects, int [][] cashflows) {
        for (int i=0 ; i<npv.length ; i++) {
            System.out.println("Project " + projects [i] + "has a npv of" + npv [i] + " and cashflows " + cashflows [1][i] + "Euro");

        }
    }
}

Answer 1

就是这样，这会帮到你-

public class Netpresenvalue {

    public static void main(String[] args) {
        int[][] cashflows = new int[][] { { 500, 300, -200 }, { -300, 100, 700 } };
        String[] projects = new String[] { "Project 1", "Project 2" };
        JusDoIt j1 = new JusDoIt(cashflows, projects);
        for (int i = 0; i < projects.length; i++) {
            double[] netpv = j1.npv(cashflows[i]);
            j1.report(netpv, projects, cashflows[i]);
        }
    }
}

class JusDoIt {
    int[][] cashflows;
    String[] projects;

    JusDoIt(int[][] cashflows, String[] projects) {
        this.cashflows = cashflows;
        this.projects = projects;
    }

    double[] npv(int[] data) {
    double[] cap = new double[3];
    for (int i = 0; i < data.length; i++) {
        cap[i] = data[i];
    }
    return cap;
}

    void report(double[] npv, String[] projects, int[] cashflows) {
        for (int i = 0; i < npv.length; i++) {
            System.out.println("Project " + "has a npv of" + npv[i] + " and cashflows " + cashflows[i] + "Euro");

        }
    }
}

现在，你写代码的方式很糟糕，你的解释不清楚，你的基础知识非常糟糕，我不能期望它会那么糟糕，你说谢谢你的帮助，这表明你没有正确地尝试，你没有付出所有的努力，这就是为什么你的代码充满了错误。我们不是来做作业的，我希望你从下次开始就能学到这一点。