public int Calculate()
{
switch (token.type)
{
case Types.type.PLUS:
{
return(son.Calculate());
}
case Types.type.MINUS:
{
return(-son.Calculate());
}
case Types.type.NOT:
{
if (son.Calculate() == 0)
{
return(1);
}
return(0);
}
case Types.type.INC:
{
if (son is AtomNode)
{
int num = VarList.Get(token.value).Calculate();
ITreeNode node = VarList.Get(son.ToOut());
VarList.Add(son.ToOut(),
new BinarNode(new Token(Types.type.PLUS, "+"), node, new AtomNode(new Token(Types.type.INTEGER, "1"))));
return(num);
}
throw new Exception();
}
case Types.type.DEC:
{
if (son is AtomNode)
{
int num = VarList.Get(token.value).Calculate();
ITreeNode node = VarList.Get(son.ToOut());
VarList.Add(son.ToOut(),
new BinarNode(new Token(Types.type.MINUS, "-"), node, new AtomNode(new Token(Types.type.INTEGER, "1"))));
return(num);
}
throw new Exception();
}
}
throw new Exception();
}
public int Calculate()
{
if (condition.Calculate() != 0)
{
return(block.Calculate());
}
return(0);
}
public int Calculate()
{
while (condition.Calculate() != 0)
{
circlesCount++;
block.Calculate();
if (circlesCount > 10000)
{
throw new StackOverflowException();
}
}
return(0);
}
// calculate the expression
public int Calculate()
{
return(root.Calculate());
}
public int Calculate()
{
switch (token.type)
{
case Types.type.MULT:
return(left.Calculate() * right.Calculate());
case Types.type.DIV:
{
int a = right.Calculate();
if (a == 0)
{
a++;
throw new NullDivisionException();
}
return(left.Calculate() / a);
}
case Types.type.MOD:
{
int a = right.Calculate();
if (a == 0)
{
a++;
throw new NullDivisionException();
}
return(left.Calculate() % a);
}
case Types.type.EQUAL:
{
VarList.Add(left.ToOut(), right);
return(VarList.Get(token.value).Calculate());
}
case Types.type.MAX:
return(Math.Max(left.Calculate(), right.Calculate()));
case Types.type.MIN:
return(Math.Min(left.Calculate(), right.Calculate()));
case Types.type.POWER:
return((int)Math.Pow(left.Calculate(), right.Calculate()));
case Types.type.PLUS:
return(left.Calculate() + right.Calculate());
case Types.type.MINUS:
return(left.Calculate() - right.Calculate());
case Types.type.LARGER:
{
if (left.Calculate() > right.Calculate())
{
return(1);
}
break;
}
case Types.type.LARGEREQUAL:
{
if (left.Calculate() >= right.Calculate())
{
return(1);
}
break;
}
case Types.type.SMALLER:
{
if (left.Calculate() < right.Calculate())
{
return(1);
}
break;
}
case Types.type.SMALLEREQUAL:
{
if (left.Calculate() <= right.Calculate())
{
return(1);
}
break;
}
case Types.type.ISEQUAL:
{
if (left.Calculate() == right.Calculate())
{
return(1);
}
break;
}
case Types.type.NOTEQUAL:
{
if (left.Calculate() != right.Calculate())
{
return(1);
}
break;
}
case Types.type.AND:
{
if ((left.Calculate() != 0) && (right.Calculate() != 0))
{
return(1);
}
break;
}
case Types.type.OR:
{
if ((left.Calculate() != 0) || (right.Calculate() != 0))
{
return(1);
}
break;
}
}
return(0);
}