C - 恶意定位的 3D 数组生成数据访问冲突

Question

我在C中有一个malloc’ed的替身三维数组，当通过索引访问时，它会生成数据访问违规错误。

分配功能：（简化版本不检查null或错误时释放）

 #define DIMENSIONA 50
 #define DIMENSIONB 30
 #define DIMENSIONC 2
 double *** Array;
 void InitialiseDataStructure(void)
 {
 int Counter = 0;
 int PointCounter = 0;  
 Array = (double ***)malloc(DIMENSIONA * (sizeof(double**)));   
 for (Counter = 0; Counter < DIMENSIONA; Counter++)
   {               
      Array[Counter] = (double **)malloc(DIMENSIONB * sizeof(double *));                                  
      for (PointCounter = 0; PointCounter < DIMENSIONB; PointCounter++)
      {          
           Array[Counter][PointCounter] = (double *)malloc(DIMENSIONC * sizeof(double));
      }
   }
 }

然后像这样访问阵列：

 Array[x][y][z] = 0;

这将生成数据访问违规错误并终止程序。

我读了一遍，试着得出结论——我很笨。请帮忙！！！

Answer 1

以下for循环中的POINTS_PER_GEOFENCE是什么？

  for (PointCounter = 0; PointCounter < POINTS_PER_GEOFENCE; PointCounter++)

那不应该是吗

Array = malloc(DIMENSIONA * (sizeof(double**)));   
for (Counter = 0; Counter < DIMENSIONA; Counter++) {               
      Array[Counter] = malloc(DIMENSIONB * sizeof(double *));                                  
      for (PointCounter = 0; PointCounter < DIMENSIONB; PointCounter++) {     
          Array[Counter][PointCounter] = malloc(DIMENSIONC * sizeof(double));
      }
}

注：

• 请阅读此内容以转换malloc()的返回值
• 在使用之前，您需要检查malloc()是否返回了成功和失败