randomnumθ

达内IT培训Core Java全部笔记 是学习Java编程的好东西

package com.tarena.day03;

import java.util.Arrays;
import java.util.Scanner;

public class RandomNum {
		int[] nums = new int[4];							//保存随机生成数
		int[] temp = new int[4];							//保存输入的数
		
		public void setNum(){								//生成随机不相同的四个0~9之间的数
			out:for(int i=0; i<nums.length; i++){
				int temp = (int)(Math.random()*10);
				nums[i] = temp;
				for (int j = 0; j < i; j++) {
					if(temp==nums[j]){
						--i;
						continue out;
					}
				}
			}
		}
		
		public void setTemp(int temp, int i){				//输入数字
			this.temp[i] = temp;
		}
		
		public boolean guessSuccess(){						//判断是否猜数成功
			 return Arrays.equals(nums, temp);	
		}
		
		public void compareNum(){							//判断猜正确的数字位置是否相同
			int a=0;
			int b=0;
			for (int i = 0; i < temp.length; i++) {
				for (int j = 0; j < nums.length; j++) {
					if(temp[i]==nums[i] && i==j){
						++a;
					}else if(temp[i]==nums[j] && i!=j){
						++b;
					}
				}
				
			}
			System.out.println("-----" + a + "a" + b + "b");
		}
		
		public void print(){
			for (int j = 0; j < temp.length; j++) {			//显示输入的数
				System.out.print(temp[j]+" ");	
			}		
		}
		
		public void printRandom(){		
			for (int i = 0; i < nums.length; i++) {			//显示机器随机的数
				System.out.print(nums[i]+" ");
			}
			System.out.println();
		}
}

class Test{

	public static void main(String[] args) {
		RandomNum rn= new RandomNum();
		rn.setNum();
		int chances = 7;
		System.out.println("Guess Number Game Start! You have " + chances + " chances");
		for (int i = 0; i < chances; i++) {						//只允许猜7次
			int[] temp = new int[4];
			re:for (int j = 0; j < temp.length; j++) {		//分别输入4个数字
				System.out.println("Please enter the " + (j+1) + "th number:");
				Scanner sc = new Scanner(System.in);
				temp[j] = sc.nextInt();
				if(temp[j]<0 || temp[j]>9){					//判断输入是否有效
					System.out.println("error input! Please re-enter the " + (j+1) + "th number:");
					--j;
					continue re;
				}
			}
			for (int n=0; n<temp.length; n++) {				//分别传递4个数
				rn.setTemp(temp[n], n);
			}
			rn.print();										//打印出输入的数字
			rn.compareNum();								//打印出比较结果
			if(rn.guessSuccess()){							//判断如果成功则退出
				System.out.println("Congratulation!! You get it!");
				break;
			}else{
				if(i!=(chances-1)){
					System.out.println("You have " + (chances-1-i) + " chances!");
				}else{
					System.out.println("Sorry! You have no chance!");
					System.out.print("The Random number is ");
					rn.printRandom();
				}
			}
		}
	}
}