Introduction to Java Programming编程题6.7<统计0~9随机数出现的次数>

来源：互联网发布：淘宝网怎么举报卖家编辑：程序博客网时间：2024/06/03 12:48

建立一个大小为10的int数组，例如随机出现的数字为5则将下标为5的数字加1.

/*The random digits:--------------------------------2  5  9  9  1  9  2  7  0  19  2  4  2  7  5  4  5  6  12  4  7  8  1  7  6  8  2  95  5  9  9  2  5  2  2  5  66  9  2  2  1  9  6  2  1  32  3  5  0  6  4  1  2  1  78  3  5  2  8  9  5  9  8  98  8  8  0  0  3  0  2  5  83  3  7  8  2  3  6  3  9  44  6  5  9  8  5  2  2  6  60 ~ 9 ocurr times:--------------------------------0 occur times:51 occur times:82 occur times:193 occur times:84 occur times:65 occur times:136 occur times:107 occur times:68 occur times:119 occur times:14 */public class CountDigitOccur {    public static void main(String[] args) {        final int SIZE = 10;        final int MAX_SIZE = 100;        int[] counts = new int[SIZE];        System.out.println("The random digits:");        System.out.println("--------------------------------");        for (int i = 0; i < MAX_SIZE; i++) {            int digits = (int)(Math.random() * 10);            System.out.print(digits + "  ");            if ((i + 1) % 10 == 0)                System.out.println();            counts[digits]++;        }        System.out.println("\n0 ~ 9 ocurr times:");        System.out.println("--------------------------------");        showCounts(counts);    }    public static void showCounts(int[] pr) {        for (int i = 0; i < pr.length; i++)            System.out.println(i + " occur times:" + pr[i]);    }}

0 0