每日总结

 代码：

import com.sun.tools.javac.Main;

import java.math.BigDecimal;

public class test {
    public static void main(String[] args) {
        float xm[][]={
                {-100000,10000,10000,10000,20000,100000},
                {-1000000,200000,200000,200000,200000,300000},
                {-100000,30000,30000,30000,30000,30000},
                {-120000,30000,30000,30000,30000,75000}
        };
        float r1 = (float) 0.08;
        float r2 = (float) 0.12;
        float num1[] = new float[6];
        float num2[] = new float[6];
        float sum1[] = {0,0,0,0};
        float sum2[] = {0,0,0,0};
        System.out.println("贴现率为："+r1);
        for (int i=0;i<6;i++){
            num1[i] = Float.parseFloat(String.format("%.4f",(float) (1.0/Math.pow((1+r1),i))));
            System.out.println("第"+i+"年的贴现因子：" +num1[i]);
        }
        for (int i=0;i<4;i++){
            for (int j=0;j<6;j++){
                sum1[i] += xm[i][j] * num1[j];
            }
            sum1[i] = Math.round(sum1[i]);
            System.out.println("项目"+i+"的NPV为："+ sum1[i]);
        }
        System.out.println("-----------------------------------------------------------------");
        System.out.println("贴现率为："+r2);
        for (int i=0;i<6;i++){
            num2[i] = Float.parseFloat(String.format("%.4f",(float) (1.0/Math.pow((1+r2),i))));
            System.out.println("第"+i+"年的贴现因子：" +num2[i]);
        }
        for (int i=0;i<4;i++){
            for (int j=0;j<6;j++){
                sum2[i] += xm[i][j] * num2[j];
            }
            sum2[i] = Math.round(sum2[i]);
            System.out.println("项目"+i+"的NPV为："+ sum2[i]);
        }
    }
}

截图：