今日总结

import java.util.*;

public class test {
    static Scanner in = new Scanner(System.in);

    public static void input(int a[], int n) {//数组输入
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }
    }

    public static int[] year_npv(int c[], int d[], double r)// 计算年净现值并存入数组
    {
        for (int t = 0; t < c.length; t++) {
            d[t] = (int) (c[t] / (Math.pow(1 + r, t)));
        }
        return d;
    }

    public static int sum_npv(int e[])// 计算最终净现值
    {
        int sum = 0;
        for (int i = 0; i < e.length; i++) {
            sum += e[i];
        }
        return sum;
    }

    public static void main(String[] args) {

        int a[] = new int[6];// 项目的年金额数组
        int b[] = new int[6];// 年净现值数组
        for (int i = 1; i <= 4; i++) {
            System.out.println("请输入项目" + i + "每年的金额:");
            input(a, 6);
            int npv1 = sum_npv(year_npv(a, b, 0.08));
            int npv2 = sum_npv(year_npv(a, b, 0.12));
            System.out.println("项目的净现值为:贴现率8%：" + npv1 + "  贴现率12%：" + npv2);
            System.out.println();
        }
    }
}