coins.java

现在有八枚银币abcdefg

public class Coins {   
    private int[] coins;   
       
    public Coins() {   
        coins = new int[8];   
        for(int i = 0; i < 8; i++)    
            coins[i] = 10;    
    }   
       
    public void setFake(int weight) {   
        coins[(int) (Math.random() * 7)] = weight;   
    }   
       
    public void fake() {   
        if(coins[0]+coins[1]+coins[2] ==    
           coins[3]+coins[4]+coins[5]) {    
            if(coins[6] > coins[7])    
                compare(6, 7, 0);    
            else    
                compare(7, 6, 0);    
        }    
        else if(coins[0]+coins[1]+coins[2] >    
                coins[3]+coins[4]+coins[5]) {    
            if(coins[0]+coins[3] == coins[1]+coins[4])    
                compare(2, 5, 0);    
            else if(coins[0]+coins[3] > coins[1]+coins[4])    
                compare(0, 4, 1);    
            if(coins[0]+coins[3] < coins[1]+coins[4])    
                compare(1, 3, 0);    
        }    
        else if(coins[0]+coins[1]+coins[2] <    
                coins[3]+coins[4]+coins[5]) {    
            if(coins[0]+coins[3] == coins[1]+coins[4])    
                compare(5, 2, 0);    
            else if(coins[0]+coins[3] > coins[1]+coins[4])    
                compare(3, 1, 0);    
            if(coins[0]+coins[3] < coins[1]+coins[4])    
                compare(4, 0, 1);    
        }    
    }   
       
    protected void compare(int i, int j, int k) {   
        if(coins[i] > coins[k])    
            System.out.print("\n假币 " + (i+1) + " 较重");    
        else    
            System.out.print("\n假币 " + (j+1) + " 较轻");    
    }   
       
    public static void main(String[] args) {   
        if(args.length == 0) {   
            System.out.println("输入假币重量（比10大或小）");   
            System.out.println("ex. java Coins 5");   
            return;   
        }   
           
        Coins eightCoins = new Coins();   
        eightCoins.setFake(Integer.parseInt(args[0]));   
        eightCoins.fake();   
    }   
}