[英]Issues with reading a 2d Array - Java
I am trying to do Conway's game of life using 2d arrays. 我正在尝试使用2d数组进行Conway的生活游戏。 This method is supposed to look at every position on a 2d array and check each of its neighbors and count how many neighbors are surrounding the position (0 being empty and 1 being occupied).
该方法应该查看2d数组上的每个位置,并检查其每个邻居,并计算该位置周围有多少邻居(0为空,1被占用)。 It then performs some logic and decides if that position is dead or alive.
然后,它执行一些逻辑并确定该位置是死的还是活的。 The issue I am having is that by the time it checks the second position the values for the tempMatrix are wrong.
我遇到的问题是,当它检查第二个位置时,tempMatrix的值是错误的。 I have specifically been checking the first position [0][0] and it changes from 0 to 1 and I have no idea why.
我特别在检查第一个位置[0] [0],它从0变为1,我不知道为什么。 Thank you in advance for your help!
预先感谢您的帮助!
public static int[][] Evolve(int[][] _array){
inputMatrix = _array;
outputMatrix = inputMatrix;
int [][] tempMatrix = inputMatrix;
System.out.println("Output Matrix:");
for (int x = 0; x < size; x++){
for (int y = 0; y < size; y++){
int neighbor_count = 0;
ArrayList<int[]> neighbors = getNeighbors(x,y);
for(int[] neighbor: neighbors){
int tempX = neighbor[0];
int tempY = neighbor[1];
int temp = tempMatrix[tempX][tempY];
if(temp == 1){
neighbor_count++;
}
}
if(tempMatrix[x][y] == 1){
if(neighbor_count == 1 || neighbor_count > 3) {
outputMatrix[x][y] = 0;
}
else{
outputMatrix[x][y] = 1;
}
}else if(neighbor_count == 3){
outputMatrix[x][y] = 1;
}else{
outputMatrix[x][y] = 0;
}
System.out.printf("%2d ",outputMatrix[x][y]);
}
System.out.println();
}
return outputMatrix;
}
Your inputMatrix
outputMatrix
and tempMatrix
are referring to the same 2D array. 您的
inputMatrix
outputMatrix
和tempMatrix
引用相同的2D数组。 Therefore, when you modify the outputMatrix
by the following code 因此,当您通过以下代码修改
outputMatrix
时
if(tempMatrix[x][y] == 1){
if(neighbor_count == 1 || neighbor_count > 3) {
outputMatrix[x][y] = 0;
}
else{
outputMatrix[x][y] = 1;
}
}else if(neighbor_count == 3){
outputMatrix[x][y] = 1;
}else{
outputMatrix[x][y] = 0;
}
The value of the tempMatrix
also changes. tempMatrix
的值也会更改。 Thus, try to make new 2D array for all the three matrices and then copy the value. 因此,尝试为所有三个矩阵创建新的2D数组,然后复制该值。
int inputMatrix[][]=new int[dimension][dimension];
Now copy the value of _array
matrix to the inputMatrix
. 现在,将
_array
matrix的值复制到inputMatrix
。
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