生成10个10以内的随机小数然后四舍五入保留两位小数最后求其平均值

Question

生成10个10以内的随机小数然后四舍五入保留两位小数最后求其平均值

Answer 1

package com.xuexi;

import java.util.Random;

public class test {
    public static void main(String[] args) {
        double[] a = new double[10];
        for (int i = 0; i < 10; i++) {
            double v = new Random().nextDouble() * 10;
//            System.out.println(v);
            double v1 = (double) Math.round(v * 100) / 100;
            System.out.println(v1);
            a[i]=v1;
        }
        double sum = 0;
        for (double v : a) {
            sum+=v;
        }
        System.out.println("平均值是："+(double) Math.round(sum/10.0 * 100) / 100);
    }
}