public override BooleanExp Replace(BooleanExp exp, char c)
{
throw new NotImplementedException();
}
public abstract BooleanExp Replace(BooleanExp exp, char c);
public AndExpression(BooleanExp op1, BooleanExp op2)
{
_operand1 = op1;
_operand2 = op2;
}
public NotExpression(BooleanExp exp)
{
this.exp = exp;
}