spreadsheet.cpp

C++高级编程这本书所附的源代码

#include "Spreadsheet.h"

bool Spreadsheet::inRange(int val, int upper)
{
  return (val >= 0 && val < upper);
}

Spreadsheet::Spreadsheet(int inWidth, int inHeight) :
  mWidth(inWidth), mHeight(inHeight)
{
  mCells = new SpreadsheetCell* [mWidth];
  for (int i = 0; i < mWidth; i++) {
    mCells[i] = new SpreadsheetCell[mHeight];
  }
}

void Spreadsheet::setCellAt(int x, int y, const SpreadsheetCell& cell)
{
  if (!inRange(x, mWidth) || !inRange(y, mHeight)) {
    return;
  }

  mCells[x][y] = cell;
}

SpreadsheetCell Spreadsheet::getCellAt(int x, int y)
{
  SpreadsheetCell empty;

  if (!inRange(x, mWidth) || !inRange(y, mHeight)) {
    return (empty);
  }
  return (mCells[x][y]);
}

Spreadsheet::~Spreadsheet()
{
  for (int i = 0; i < mWidth; i++) {
    delete [] mCells[i];
  }

  delete [] mCells;
}