day07作业
2018-07-18 22:45 好好学习哟 阅读(238) 评论(0) 编辑 收藏 举报操作1 数组遍历
class ArrayDemo3 {
public static void main(String[] args) {
//数组的遍历
int[] arr = {11,22,33,44,55,66};
print(arr);
}
public static void print(int[] arr){
for (int i = 0;i < arr.length ;i++ ) {
System.out.println(arr[i]);
}
}
}
操作2 取最值
class ArrayDemo4 {
public static void main(String[] args) {
//数组获取最值
int[] arr = {33,22,331,134,55,77};
int max = getMax(arr);
System.out.println(max);
}
public static int getMax(int[] arr){
int max = arr[0];
for (int i = 1;i < arr.length ;i++ ) {
if (arr[i] > max) {
max = arr[i];
}
}
return max;
}
}
操作3 数组元素反转
class ArrayDemo5 {
public static void main(String[] args) {
int[] arr = {23,34,45,56,67,78,89};
reverseArr(arr);
print(arr);
}
public static void reverseArr(int[] arr) {
for (int i = 0;i < (arr.length / 2) ;i++ ) {
int temp = arr[i];
arr[i] = arr[arr.length- 1 - i];
arr[arr.length -1 - i] = temp;
}
}
public static void print(int[] arr) {
for (int i = 0;i < arr.length ;i++ ) {
System.out.println(arr[i]);
}
}
}
操作4 数组查表法
import java.util.Scanner;
class ArrayDemo6 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("输入一个1-7的星期");
int index = sc.nextInt();
System.out.println("星期" + getWeek(index));
}
public static char getWeek(int week) {
char[] arr = {'一','二','三','四','五','六','七'};
return arr[week - 1];
}
}
操作5数组元素查找(查找指定元素第一次在数组中出现的索引)
class ArrayDemo7 {
public static void main(String[] args) {
//数组元素查找(查找指定元素第一次在数组中出现的索引)
int[] arr = {11,23,34,45,54,34};
int index = getIndex(arr,34);
System.out.println("index = " + index);
}
public static int getIndex(int[] arr,int value) {
for (int i = 0;i < arr.length ;i++ ) {
if (arr[i] == value) {
return i;
}
}
return -1;
}
}
import java.util.Scanner;
class doubleColor {
public static void main(String[] args) {
int totalMoney = 0; //下注总费用
int price = 2; //单注金额
int count = 0; //购买的注数
boolean isBuy = false;//标记是否购买
int[] num = null; //定义个数组存储双色球号码
Scanner input = new Scanner(System.in);
do {
System.out.println();
System.out.println("*****欢迎进入双色球彩票系统*****");
System.out.println("\t1.购买彩票");
System.out.println("\t2.查看开奖");
System.out.println("\t3.退出");
System.out.println("********************************");
System.out.println("请选择菜单：");
int choice = input.nextInt();
switch (choice) {
case 1:
//购买彩票
System.out.println("[双色球彩票系统 > 购买彩票]");
System.out.println("您需要下多少注");
count = input.nextInt();//买了多少注
totalMoney = count * price;//总下注钱数
//开始选号（6个红色球1个蓝色球）
num = new int[7];//用来存储双色球号->6红1蓝
for (int i = 0;i < num.length ;i++ ) {
int red;
int blue;
if (i < num.length - 1) {
System.out.println("请输入6个红色球号（数字为1-33），第" + (i+1) + "个红色球号为：");
red = input.nextInt(33);
num[i] = red;
}else {
System.out.println("请输入一个蓝色球号（数字为1-16）");
blue = input.nextInt(16);
num[i] = blue;
}
}
//输出买好的彩票信息
System.out.println("您一共买了" + count + "注，共需支付" + totalMoney + "元，所选号码为：");
for (int i = 0;i < num.length ;i++ ) {
System.out.print(num[i]+"\t");
}
System.out.println();
isBuy = true;
break;
case 2:
System.out.println("[双色球彩票系统>查看开奖]");
if (isBuy) {//判断是否购买了彩票
isBuy = false;
//调用getLuckNum方法得到一个随机中奖号
int luckNum[] = getLuckNum();
//输出你自己买的彩票号
System.out.print("已买的彩票号为：");
for (int n:num) {
System.out.print(n + "\t");
}
System.out.println();
//输出当期的中奖号码
System.out.println("当期的中奖号为：");
for(int n:luckNum){
System.out.print(n + "\t");
}
System.out.println();
//判断获奖等级
int result = getCompareResult(num,luckNum);
//根据获奖等级输出结果
if (result == 1) {
System.out.println("【一等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (500 *count)+"】万元");
}else if (result == 2) {
System.out.println("【二等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (400 *count)+"】万元");
}else if (result == 3) {
System.out.println("【三等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (300 *count)+"】万元");
}else if (result == 4) {
System.out.println("【四等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (200 *count)+"】万元");
}else if (result == 5) {
System.out.println("【五等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (100 *count)+"】万元");
}else if (result == 6) {
System.out.println("【六等奖】，恭喜你！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (5 *count)+"】万元");
}else {
System.out.println("【望再接再厉】，sorry！！共下了【" + count + "】注，投资【" + totalMoney + "】元，获奖【" + (0 *count)+"】万元");
}
}else {
System.out.println("请先购买彩票，再查看开奖情况");
}
break;
case 3:
System.out.println("谢谢使用");
return;
default:
System.out.println("输入错误");
}
}while (true);
}
//随机生成一个中奖号码
public static int[] getLuckNum(){
int luckNum[] = new int[7];
for (int i = 0;i < luckNum.length ;i++ ) {
if (i < luckNum.length - 1) {//红球
luckNum[i] = (int)(Math.random() * 33) + 1;//生成一个1-33的随机数
}else {//蓝色球
luckNum[i] = (int)(Math.random() * 16) + 1;//生成一个1-16的随机数
}
}
return luckNum;
}
//计算获奖等级
public static int getCompareResult(int num[],int luckNum[]) {
//查看自己中奖情况
int luckLevel = 0;//中奖等级1-6
int redEqualCount = 0;//红球相等的数量
int blueEqualCount = 0;//蓝色球相等的数量
//将自己的号码与开奖号码进行比较
for (int i = 0;i < num.length ;i++ ) {
if (i < num.length - 1) {
//比较红色球
int r = num[i];//每遍历一次将自己的一个红球号与中奖的所有号码进行比较
for (int j = 0;j < luckNum.length - 1 ;j++ ) {
if (r == luckNum[j]) {
redEqualCount++;
}
}
}else {//比较蓝色球
if (num[num.length - 1] == luckNum[luckNum.length - 1]) {
blueEqualCount++;
}
}
}
//得出结果
if (redEqualCount == 6 && blueEqualCount == 1) {
luckLevel = 1;
}else if (redEqualCount == 6) {
luckLevel = 2;
}else if (redEqualCount == 5 && blueEqualCount == 1) {
luckLevel = 3;
}else if (redEqualCount == 5 || (redEqualCount == 4 && blueEqualCount == 1)) {//四等奖
luckLevel = 4;
}else if (redEqualCount == 4 || (redEqualCount == 3 && blueEqualCount == 1)) {//括号
luckLevel = 5;
}else if (blueEqualCount == 1) {
luckLevel = 6;
}
return luckLevel;
}
}
