Java程序不像python程序那样工作，我不知道为什么

I am currently learning java, I know Python just fine, but I can't seem to make my java problem work the same way as my python program. Here is the python program:

我目前正在学习java,我知道Python很好,但我似乎无法让我的java问题与我的python程序一样工作。这是python程序:

import random as rand
successes = 0
for x in range (1000):
    stake = 100
    bets = 0
    while stake >0 and stake <200:
        play = rand.randint(0,1)
        bets +=1
        if play == 0:
            stake = stake -1
        else:
            stake = stake + 1
    if stake == 200:
        successes +=1
    print ('stake = ', stake, 'bets made =', bets)
print (successes/1000)
print(bets/1000)

when I run it I get something like this:

当我运行它时我得到这样的东西:

stake =  0 bets made = 19832
stake =  200 bets made = 5240
stake =  200 bets made = 3156
stake =  0 bets made = 10338
stake =  200 bets made = 11198
stake =  0 bets made = 6150
stake =  200 bets made = 10934
stake =  200 bets made = 11368
stake =  0 bets made = 8724
stake =  0 bets made = 17158
stake =  200 bets made = 6158
stake =  200 bets made = 7690
stake =  200 bets made = 2170
stake =  200 bets made = 12268
stake =  0 bets made = 15878
stake =  200 bets made = 16486
stake =  0 bets made = 6396
0.518
6.396

Now here is what I did for my java program I was told to use Math.random() and Math.Round() and I think that may be where I'm running into a problem I have no idea where to put Math.Round()

现在这里是我为我的java程序做的事情我被告知要使用Math.random()和Math.Round(),我想这可能是我遇到问题的地方我不知道在哪里放Math.Round ()

public class Gambler {
    public static void main(String[] args){
       double successes = 0;
       for (int i = 0; i <1000;i++){
           double stake = 100;
           double bets = 0;
           while(stake>0 && stake <200){
               bets++;
               if (Math.random()<0.5) stake ++;
               else stake --;
           if (stake==200) successes++;

           System.out.println("stake = "+ stake + " bets made = " + bets);

           }
       System.out.println("average successes = " + successes/1000);
       System.out.println("average bets = " + bets/1000);
       }
    }
    }

When I run this one I get this

当我运行这个时,我得到了这个

stake = 196.0 bets made = 10290.0
stake = 197.0 bets made = 10291.0
stake = 198.0 bets made = 10292.0
stake = 197.0 bets made = 10293.0
stake = 196.0 bets made = 10294.0
stake = 197.0 bets made = 10295.0
stake = 198.0 bets made = 10296.0
stake = 197.0 bets made = 10297.0
stake = 198.0 bets made = 10298.0
stake = 197.0 bets made = 10299.0
stake = 196.0 bets made = 10300.0
stake = 195.0 bets made = 10301.0
stake = 196.0 bets made = 10302.0
stake = 197.0 bets made = 10303.0
stake = 196.0 bets made = 10304.0
stake = 197.0 bets made = 10305.0
stake = 196.0 bets made = 10306.0
stake = 197.0 bets made = 10307.0
stake = 198.0 bets made = 10308.0
stake = 199.0 bets made = 10309.0
stake = 200.0 bets made = 10310.0
average successes = 0.512
average bets = 10.31

2 个解决方案

#1

In python if stake == 200: is outside of the while loop, in java it's inside, similarly your outputs in java are inside the for loop when they are outside it in python. I believe this is closer to your python code.

在python中,如果stake == 200:在while循环之外,在java里面,类似于java中的输出在python中位于for循环之外。我相信这更接近你的python代码。

public class Gambler {
    public static void main(String[] args){
       double successes = 0;
       double bets = 0;
       for (int i = 0; i <1000;i++){
           double stake = 100;
           bets = 0; // initialize outside of for loop
           while(stake>0 && stake <200){
               bets++;
               if (Math.random()<0.5) stake ++;
               else stake --;
           }
           if (stake==200) successes++;

           System.out.println("stake = "+ stake + " bets made = " + bets);
       }    
       System.out.println("average successes = " + successes/1000);
       System.out.println("average bets = " + bets/1000);
    }
}

2 个解决方案

#1

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