模拟T次投掷硬币

小灰灰 2021-07-24 23:49 305阅读 0赞

**一 代码**

package Flips;
    
    import Counter.Counter;
    import common.StdOut;
    import common.StdRandom;
    
    /**
    * Copyright (C), 2020-2020, XXX有限公司
    * FileName: Flips
    * Author:   cakin
    * Date:     2020/1/11
    * Description: 模拟T次投掷硬币
    */
    public class Flips {
        public static void main( String[] args ) {
            int T = Integer.parseInt(args[0]);
            Counter heads = new Counter("heads");
            Counter tails = new Counter("tails");
            for (int t = 0;t<T;t++){
                if(StdRandom.bernoulli(0.5)){
                    heads.increment();
                }else {
                    tails.increment();
                }
            }
            StdOut.println(heads);
            StdOut.println(tails);
            StdOut.println("delta:"+Math.abs(heads.tally()-tails.tally()));
        }
    }

**二 测试结果**

当入参为10000时的测试结果。

4958 heads
    5042 tails
    delta:84

**三 代码**

package Flips;
    
    
    import Counter.Counter;
    import common.StdOut;
    import common.StdRandom;
    
    
    /**
    * Copyright (C), 2020-2020, XXX有限公司
    * FileName: FlipsMax
    * Author:   cakin
    * Date:     2020/1/11
    * Description: 一个接受对象参数作为对象返回值的静态方法,实现投掷硬币正反比大小
    public class FlipsMax {
        public static Counter max(Counter x,Counter y){
            if(x.tally()>y.tally()) return x;
            else return y;
        }
        public static void main( String[] args ) {
            int T = Integer.parseInt(args[0]);
            Counter heads = new Counter("heads");
            Counter tails = new Counter("tails");
            for (int t = 0;t<T;t++){
                if(StdRandom.bernoulli(0.5)){
                    heads.increment();
                }else {
                    tails.increment();
                }
            }
            if(heads.tally()==tails.tally())
                StdOut.println("Tie");
            else StdOut.println(max(heads,tails)+" wins");
        }
    }

**四 测试**

当投掷10000次

5042 tails wins

**五 代码参考**

[https://gitee.com/cakin24/Algorithm][https_gitee.com_cakin24_Algorithm]

[https_gitee.com_cakin24_Algorithm]: https://gitee.com/cakin24/Algorithm