1.猜数字游戏
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int answer = (int) (Math.random() * 100 + 1);
int thyAnswer;
int counter = 0;
do {
counter += 1;
System.out.print("请输入你猜的数字: ");
thyAnswer = input.nextInt();
if (thyAnswer > answer) {
System.out.println("小一点!");
}
else if (thyAnswer < answer) {
System.out.println("大一点!");
}
else {
System.out.println("恭喜你猜对了! 你总共猜了" + counter + "次.");
}
} while (thyAnswer != answer);
if (counter > 7) {
System.out.println("智商捉急!!!");
}
input.close();
}
2.Graps赌博游戏
public class CrapsGame {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int money = 1000;
do {
System.out.println("你的总资产为: ￥" + money + "元.");
int bet;
do {
System.out.print("请下注: ");
bet = input.nextInt();
} while (bet <= 0 || bet > money);
int face1 = (int) (Math.random() * 6 + 1);
int face2 = (int) (Math.random() * 6 + 1);
int firstPoint = face1 + face2;
System.out.println("玩家摇出了" + firstPoint + "点.");
boolean needsGoOn = false;
switch (firstPoint) {
case 7:
case 11:
money += bet;
System.out.println("玩家胜!");
break;
case 2:
case 3:
case 12:
money -= bet;
System.out.println("庄家胜!");
break;
default:
needsGoOn = true;
}
while (needsGoOn) {
face1 = (int) (Math.random() * 6 + 1);
face2 = (int) (Math.random() * 6 + 1);
int currentPoint = face1 + face2;
System.out.println("玩家摇出了" + currentPoint + "点.");
if (currentPoint == 7) {
money -= bet;
System.out.println("庄家胜!");
needsGoOn = false;
} else if (currentPoint == firstPoint) {
money += bet;
System.out.println("玩家胜!");
needsGoOn = false;
}
}
} while (money > 0);
System.out.println("你已经破产了!!!");
input.close();
}
}
3.约瑟夫环问题
public static void main(String[] args) {
boolean[] persons = new boolean[30];
for (int i = 0; i < persons.length; i++) {
persons[i] = true;
}
int counter = 0; // 弄死了多少人
int index = 0; // 操作数组的下标
int number = 0; // 报数的值
while (counter < 15) {
if (persons[index]) {
number += 1;
if (number == 9) {
persons[index] = false;
counter += 1;
number = 0;
}
}
index += 1;
if (index == persons.length) {
index = 0;
}
}
for (boolean isChrist: persons) {
System.out.print(isChrist ? "基" : "非");
}
}
4.冒泡排序
public class Test09 {
public static void main(String[] args) {
int[] x = { 23, 67, 12, 99, 58, 77, 88, 4, 45, 81 };
bubbleSort(x);
for (int a: x) {
System.out.print(a + " ");
}
}
public static void bubbleSort(int[] array) {
boolean swapped = true;
for (int i = 1; swapped && i <= array.length - 1; i++) {
swapped = false;
for (int j = 0; j < array.length - i; j++) {
if (array[j] > array[j + 1]) {
// 交换两个元素
int temp = array[j];
array[j] = array[j + 1];
array[j + 1] = temp;
swapped = true;
}
}
}
}
}
5.杨辉三角
public static void main(String[] args) {
int[][] y = new int[10][];
for (int i = 0; i < y.length; i++) {
y[i] = new int[i + 1];
for (int j = 0; j < y[i].length; j++) {
if (j == 0 || j == i) {
y[i][j] = 1;
}
else {
y[i][j] = y[i - 1][j] + y[i - 1][j - 1];
}
System.out.print(y[i][j] + "\t");
}
System.out.println();
}
}
6.随机双色球
public static void bubbleSort(int[] array) {
boolean swapped = true;
for (int i = 1; swapped && i <= array.length - 1; i++) {
swapped = false;
for (int j = 0; j < array.length - i; j++) {
if (array[j] > array[j + 1]) {
int temp = array[j];
array[j] = array[j + 1];
array[j + 1] = temp;
swapped = true;
}
}
}
}
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("机选几注: ");
int n = input.nextInt();
input.close();
for (int counter = 1; counter <= n; counter++) {
int[] redBalls = new int[6];
for (int i = 0; i < redBalls.length;) {
// 生成1-33的随机数作为红色球的号码
int number = (int) (Math.random() * 33 + 1);
// 检查此号码在之前选中的号码中有没有出现过
boolean isDuplicated = false;
for (int j = 0; j < i; j++) {
// 如果当前号码已经出现过
if (redBalls[j] == number) {
isDuplicated = true;
break;
}
}
if (!isDuplicated) {
redBalls[i] = number;
i += 1;
}
}
bubbleSort(redBalls);
for (int x : redBalls) {
System.out.printf("%02d ", x);
}
int blueBall = (int) (Math.random() * 16 + 1);
System.out.printf("| %02d\n", blueBall);
}
}
