Symbol.h

#pragma once
#include <string>
#include <vector>
#include <cstdlib>



class SymbolTableClass{
  struct Variable {
    std::string mLabel;
    int mValue;
  };
public:
  SymbolTableClass();
  bool Exists(std::string s);
  // returns true if <s> is already in the symbol table.
  void AddEntry(std::string s);
  // adds <s> to the symbol table,
  // or quits if it was already there
  int GetValue(std::string s);
  // returns the current value of variable <s>, when
  // interpreting. Meaningless for Coding and Executing.
  // Prints a message and quits if variable s does not exist.
  void SetValue(std::string s, int v);
  // sets variable <s> to the given value, when interpreting.
  // Meaningless for Coding and Executing.
  // Prints a message and quits if variable s does not exist.
  int GetIndex(std::string s);
  // returns the index of where variable <s> is.
  // returns -1 if variable <s> is not there.
  int GetCount();
  // returns the current number of variables in the symbol
  // table.

private:
  std::vector<Variable> sTable;

};