2d Array access by other classes

**deaths_seraphim** · 10-02-2001

In my program I have a number of classes. In one of these a 2D array of structs is created using

array = new Variables *[rows];
for (int j = 0; j < rows; j++)
{
array[j] = new Variables[cols];
}

In one of my other classes one of my methods is querying the array to get a bool value from it using:
// accessing the constructor of the array class
Array arrayCells;

for (int i=0; i < nRows; i++)
{
for (int j=0; j < nCols; j++)
{
bool cell = arrayCells.checkCellStatus(i,j);
}
}

However it always returns a false bool value for the whole array even though I know they aren't all false.

I think I might need to pass the array to the class thats trying to access it through a constructor but when i tried that the compiler says that it cant find matching function to the structure I declared in the array class

Im new to c++ programming and seem to have lost my way any help that some one can give to show me the way back would be much appreciated.

**kitten** · 10-02-2001

You need to input the object's pointer to the function that uses it.

f.ex. (very simplified)

Code:

int main(void)
{
  Array NewArray;
  CheckCells(&NewArray);  // passes the object's pointer to the function
}
// --- or ---
int main(void)
{
  Array* pNewArray = new Array;
  CheckCells(pNewArray);  // also passes the pointer
  delete pNewArray;
}



bool CheckCells(Array* pArray)
{
  for (int i=0; i < nRows; i++) 
    for (int j=0; j < nCols; j++) 
      bool cell = arrayCells.checkCellStatus(i,j); 
}

I hope this helps

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