使用贴现率8%和12%分别计算每个项目的净现值(NPV)，提交源代码和实验结果截图，编程语言不限。

我这里用java实现的

 

 代码如下：

package test;
import java.math.BigDecimal;
//作者：刘子煜
public class test1 {
    public static void main(String[] args) {
        int[] project1=new int[]{-100000,10000,10000,10000,20000,100000};
        int[] project2=new int[]{-1000000,200000,200000,200000,200000,300000};
        int[] project3=new int[]{-100000,30000,30000,30000,30000,30000};
        int[] project4=new int[]{-120000,30000,30000,30000,30000,75000};
        double[] tiexian=new double[]{0.08,0.12};
        double[][] b=new double[2][6];
        //int project1result1=jia(project1,tiexian);
        for(int j=0;j<2;j++){
        for(int i=0;i<6;i++){
            b[j][i]=1/Math.pow((tiexian[j]+1), i);
            BigDecimal t = new BigDecimal(b[j][i]);
            b[j][i]=t.setScale(4, BigDecimal.ROUND_HALF_UP).doubleValue();
        }
        }
        for(int j=0;j<2;j++){
            for(int i=0;i<6;i++){
                if(j==0){
                System.out.println("第"+i+"年"+"贴现率8%的贴现因子"+b[j][i]);
                }else{
                System.out.println("第"+i+"年"+"贴现率12%的贴现因子"+b[j][i]);
                }
                    
            }
            }
        int[] project1result1=doit(project1,b);System.out.println("项目1中贴现率8%的净现值:"+project1result1[0]+"   贴现率12%的净现值:"+project1result1[1]);
        int[] project1result2=doit(project2,b);System.out.println("项目2中贴现率8%的净现值:"+project1result2[0]+"   贴现率12%的净现值:"+project1result2[1]);
        int[] project1result3=doit(project3,b);System.out.println("项目3中贴现率8%的净现值:"+project1result3[0]+"   贴现率12%的净现值:"+project1result3[1]);
        int[] project1result4=doit(project4,b);System.out.println("项目4中贴现率8%的净现值:"+project1result4[0]+"   贴现率12%的净现值:"+project1result4[1]);
        
    }
    static int[] doit(int[] a, double[][] b){
        int[] p=new int[2];
        for(int j=0;j<2;j++){
            int temp=0;
        for(int i=0;i<6;i++){
            temp=(int)(temp+a[i]*b[j][i]);
            System.out.println(temp+"-----");
        }
        p[j]=temp;
        }
        //System.out.println("8%的净现值:"+p[0]+"    12%的净现值:"+p[1]);
        return p;
        }
}