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#include <stdlib.h>
#include <stack>
#include <exception>
#include "tree.h"
struct ParserResult
{
double result;
string tree;
};
class Parser
{
public:
ParserResult calculate(string, bool);
private:
int getPriority(char);
vector<string> lexer(string);
Node* buildTree(Tree*, string);
};
class parenthese_exception: public exception
{
virtual const char* what() const throw()
{
return "Invalid parenthesized expression - check your input term.";
}
};
class operator_exception: public exception
{
virtual const char* what() const throw()
{
return "Unexpected operator placement - check your input term.";
}
};
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