public static Expression Parse(string expr, VariableStack[] vars)
{
var returns = new Expression {Term = expr};
expr = expr.Replace("²", "²0");
expr = expr.Replace("³", "³0");
expr = expr.Replace("sqrt[", "√");
expr = expr.Replace("pi", "π");
expr = expr.Replace("]", "");
expr = expr.Replace("√", "1√");
expr = expr.Replace("π", "1π1");
expr = expr.Replace("True", "1");
expr = expr.Replace("False", "0");
if (vars != null)
expr = vars.Aggregate(expr, (current, var) => current.Replace(@var.Name, @var.Value.ToString()));
char[] chars = expr.ToCharArray();
string result = "";
var group_stack = new GroupStack(new List<Stack>());
bool bracket_open = false;
foreach (char c in chars)
{
if (isNum(c))
{
result += c;
}
else
{
if (isOP(c))
{
if (!bracket_open)
{
returns._stacks.Add(new NumStack(Convert.ToDouble(result)));
returns._stacks.Add(new OpStack(c.ToString()));
}
else
{
group_stack.Value.Add(new NumStack(Convert.ToDouble(result)));
group_stack.Value.Add(new OpStack(c.ToString()));
}
result = "";
}
else if (c == '(')
bracket_open = true;
else if (c == ')')
{
bracket_open = false;
// group_stack.Value.Add(returns.getLastNum(expr, group_stack.Value));
returns._stacks.Add(group_stack);
group_stack = new GroupStack(new List<Stack>());
}
}
}
group_stack.Value = returns.dotbeforestatement(group_stack.Value);
returns.Calculate();
return returns;
}
public static Expression Parse(string expr, Var[] vars)
{
var returns = new Expression {
Term = expr
};
expr = expr.Replace("²", "²0");
expr = expr.Replace("³", "³0");
expr = expr.Replace("sqrt[", "√");
expr = expr.Replace("pi", "π");
expr = expr.Replace("]", "");
expr = expr.Replace("√", "1√");
expr = expr.Replace("π", "1π1");
expr = expr.Replace("True", "1");
expr = expr.Replace("False", "0");
if (vars != null)
{
expr = vars.Aggregate(expr, (current, var) => current.Replace(@var.Name, @var.Value.ToString()));
}
char[] chars = expr.ToCharArray();
string result = "";
var group_stack = new GroupStack(new List <Stack>());
bool bracket_open = false;
foreach (char c in chars)
{
if (isNum(c))
{
result += c;
}
else
{
if (isOP(c))
{
if (!bracket_open)
{
returns._stacks.Add(new NumStack(Convert.ToDouble(result)));
returns._stacks.Add(new OpStack(c.ToString()));
}
else
{
group_stack.Value.Add(new NumStack(Convert.ToDouble(result)));
group_stack.Value.Add(new OpStack(c.ToString()));
}
result = "";
}
else if (c == '(')
{
bracket_open = true;
}
else if (c == ')')
{
bracket_open = false;
// group_stack.Value.Add(returns.getLastNum(expr, group_stack.Value));
returns._stacks.Add(group_stack);
group_stack = new GroupStack(new List <Stack>());
}
}
}
group_stack.Value = returns.dotbeforestatement(group_stack.Value);
returns.Calculate();
return(returns);
}