Question

尝试在这里做一些非常基本的数学，但是我对Java缺乏了解会给我带来一些问题。


double[][] handProbability = new double[][] {{0,0,0},{0,0,0},{0,0,0}};
double[] handProbabilityTotal = new double[] {0,0,0};
double positivePot = 0;
double negativePot = 0;
int localAhead = 0;
int localTied = 1;
int localBehind = 2;
//do some stuff that adds values to handProbability and handProbabilityTotal

positivePot = 
   (handProbability[localBehind][localAhead] + 
   (handProbability[localBehind][localTied] / 2.0) + 
   (handProbability[localTied][localAhead] / 2.0) ) / 
   (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0));

negativePot = 
    (handProbability[localAhead][localBehind] + 
       (handProbability[localAhead][localTied] / 2.0) + 
          (handProbability[localTied][localBehind] / 2.0) ) / 
    (handProbabilityTotal[localAhead] + (handProbabilityTotal[localTied] / 2.0));

最后两行给我带来了麻烦（抱歉他们很长）。编译器错误：


src/MyPokerClient/MyPokerClient.java:180: operator / cannot be applied to double[],double
            positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) );
                                                                                                                                                                                                                                             ^
src/MyPokerClient/MyPokerClient.java:180: operator + cannot be applied to double,
            positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) );
                                                                                                                                                                                                 ^
src/MyPokerClient/MyPokerClient.java:180: operator / cannot be applied to double,
            positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) );

不确定问题是什么。对于基础数学，你不需要任何特殊的东西，对吧？

Answer 1

在第一行(handProbability[localTied] / 2.0)的最后一部分，您尝试划分数组（hardProbability[localTied]）而不是数字（其中一个值）。

Answer 2

最后一行之前的行有问题。

positivePot = 
   (handProbability[localBehind][localAhead] + 
   (handProbability[localBehind][localTied] / 2.0) + 
   (handProbability[localTied][localAhead] / 2.0) ) / 
   (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0));

handProbability是一个二维双数组。所以handProbability [localTied]是一个双打数组。它不是双重价值。基于你的最后一行，我认为它应该是handProbabilityTotal [localTied]。

Answer 3

由于handProbability是多维数组，因此无法将数组划分为数字：

handProbability[localTied] / 2.0

当然，它会给你错误。修复此行。你可能意味着handProbabilityTotal？

Java新手不能做简单的数学运算符错误

3 个答案: