java三星题之_Java三星题之剪刀石头布（三局两胜）

喜欢ヅ旅行 2022-11-06 13:00 287阅读 0赞

原题：

Write a program that plays the popular scissor-rock-papergame(A scissor can cut a paper.a rock can knock a scissor,and a paper can wrapa rock ).The program randomly generates a number 0,1 or 2 representingscissor,rock,and paper.The program prompts the user to enter a number 0,1 or 2and displays a message indicating whether the user or the computerwins,loses,or draws.Revise the program to let user continuously play untileither the user or the computer wins more than two times.

题目来源：

题目选自《JAVA程序语言设计》 P108-3.17\*+ P153-4.34\*\*\*

解题思路：

建立一个循环，循环内首先通过Math.random()\*生成一个0~2的随机数赋值给computer(即计算机)，从输入端输入一个0-2的数字(输出不符合规则则重新输入)赋值给user(即玩家)，通过switch语句数字对应输出计算机和用户所要出的手势，随后用if-else语句进行比较判断，如果user赢则提示user获胜且玩家获胜数num1加一，computer赢则提示computer获胜且计算机获胜数num2加一，平局则提示平局，当有一方赢了两场询问时否继续游戏，是则重新开始；否则跳出循环，输出游戏结束，最后通过三目运算符判断并输出谁是赢家。

代码如下：

import java.util.\*;

import java.util.Scanner;

public class Main\{

public static void main(String\[\] args) \{

int num1=0,num2=0;

while (true)

int computer= (int) (Math.random()\*3); //产生一个0~2的随机数并赋给计算机

Scanner input=new Scanner(System.in);

System.out.print("scissor (0), rock (1), paper (2):");

int user=input.nextInt(); //用户端输入

if (user> 2 || user < 0) //如果用户输入数不在0~2间，则会要求重新输入本次数据

continue;

System.out.print("The Computer is ");

switch(computer) //识别计算机的数并对应输出scissor、rock或者paper

case 0:

System.out.print("scissor. ");break;

case 1:

System.out.print("rock.");break;

case 2:

System.out.print("paper.");break;

switch(user) //识别用户输入的数并对应输出scissor、rock或者paper

case 0:

System.out.print(" You are scissor.");break;

case 1:

System.out.print(" You are rock. ");break;

case 2:

System.out.print(" You are paper. ");break;

//比较computer和user的数据.

if (computer == user) //平局

System.out.println("too. It is a draw");

else if (user== ++ computer ||(computer == 2 && user ==0)) //user比computer大1或者computer为2时user为0

System.out.println("You won");

num2++;

else

System.out.println("computer won");

num1++;

if ((num1>=2)||(num2>=2)) //如果计算机或者用户赢了两局，则跳出

System.out.print("Do you want to continue?(Enter Y to continue,EnterN to exit):"); //询问是否要继续，输入Y继续，输入N退出

StringChoose = input.next();

if (Choose.equals("Y")) //输入Y，计数器清零重新开始

num1=0;

num2=0;

continue;

else if (Choose.equals("N")) //输入N，退出游戏

break;

System.out.println("Game over"); //输入游戏结束

System.out.println((num1>num2)?"computer win":"you win"); //输出赢家

运行结果：

/\*output:

scissor (0), rock (1), paper(2):2

The Computer is rock. You arepaper. You won

scissor (0), rock (1), paper(2):1

The Computer is scissor. You are rock. You won

Do you want tocontinue?(Enter Y to continue,Enter N to exit):Y

scissor (0), rock (1), paper(2):1

The Computer is rock. You arerock. too. It is a draw

scissor (0), rock (1), paper(2):2

The Computer is scissor. You are paper. computer won

scissor (0), rock (1), paper(2):1

The Computer is rock. You arepaper. You won

scissor (0), rock (1), paper(2):1

The Computer is scissor. You are rock. You won

Do you want tocontinue?(Enter Y to continue,Enter N to exit):N

Game over

you win

\*///~

java三星题之_Java三星题之剪刀石头布（三局两胜）

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