public Add(IRpnExpression leftExpression, IRpnExpression rightExpression)
{
_leftExpression = leftExpression;
_rightExpression = rightExpression;
}
public Multiply(IRpnExpression leftExpression, IRpnExpression rightExpression)
{
_leftExpression = leftExpression;
_rightExpression = rightExpression;
}
public Subtraction(IRpnExpression leftExpression, IRpnExpression rightExpression)
{
_leftExpression = leftExpression;
_rightExpression = rightExpression;
}
public Divide(IRpnExpression leftExpression, IRpnExpression rightExpression)
{
_leftExpression = leftExpression;
_rightExpression = rightExpression;
}