RPN

#pragma once
#include <string>
#include <memory>
#include <vector>
#include <stack>

using namespace std;

class ReversePolandNotation
{
private:
    int getPriority(char character);
    bool isAlphaNum(string  str);
    bool isDigit(string  str);
    vector<string> * parseFormula(string * input);
public:
    ReversePolandNotation();
    string performCalculation(string formula);
    string evaluateFormula(vector<string> * formula);
    //string evaluateStingFormula(vector<string> * formula);
    ~ReversePolandNotation();
};