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#include <vector>
#include <string>
#include <sstream>
#include <math.h>
using namespace std;
enum NodeType
{
OPERAND_NODE,
OPERATOR_NODE,
};
class Node
{
public:
Node();
double solve();
template <class T>
double castSolve(Node*);
Node *leftChild;
Node *rightChild;
NodeType type;
};
class OperatorNode: public Node
{
public:
OperatorNode();
double solve();
char function;
};
class OperandNode: public Node
{
public:
OperandNode();
double solve();
double value;
};
class Tree
{
public:
Tree();
Node *root;
Node* addOperand(Node**, double);
Node* addOperator(Node**, char);
string print(string);
private:
vector<Node*> *nodeCollection;
};
class divide_exception: public exception
{
virtual const char* what() const throw()
{
return "A divison through zero had to be prevented by the parser - check your input term.";
}
};
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