class PedestrianField/******************************************************/
{
  int value;
  boolean[][]pField;
  
/************constructor************************************/  

  PedestrianField(int gridColumns, 
                  int gridLines
                 )
  {
    pField = new boolean[gridColumns][gridLines];
    for(int i=0; i<gridColumns; i++)
    {
      for(int j=0; j<gridLines; j++)
      {
       pField[i][j]= false;
      }
    }
  }
  
  /********************methods*********************************************  
  void placePed(int x, int y)
  void removePed(int x, int y)
  void setValue(int x, int y, boolean p)
  int getGridLines()
  int getGridColumns()
  boolean isOccupied(int x,int y)
  int getValue(x,y)
 */
 
 void placePed(int x, int y)
 {
   pField[x][y]= true;
 }
 
 void removePed(int x, int y)
 {
   pField[x][y]= false;
 }
 
 void setValue(int x, int y, boolean p)
 {
   pField[x][y]= p;
 }
 
 int getGridColumns()
 {
   return pField.length;
 }
 
 int getGridLines()
 {
   return pField[0].length;
 }
 
 boolean isOccupied(int x,int y)
 {
   return pField[x][y];
 }
 
 int getValue(int x,int y)
 {
   int value = 1;
   if (pField[x][y] == true )
   { 
      value = 0;
   }
   return value;
 }
  
}