// VarTable.cpp     Dave Reed      9/30/03
////////////////////////////////////////////////

#include <string>
#include <vector>
#include "VarTable.h"
using namespace std;

VarTable::VarTable()
// constructor
{
	// does nothing
}

void VarTable::Update(string varName, int varValue)
// Assumes: varName is a variable name
// Results: if already stored, corresponding entry in vals is set to varValue
//          otherwise, varName & varValue are added to vars & vals vectors
{
	vars[varName] = varValue;
}


int VarTable::Lookup(string varName)
// Assumes: varName is a variable name
// Returns: if already stored, corresponding entry in vals is returned
//          otherwise, varName & 0 are added to vars & vals vector, returns 0
{
	if (vars.find(varName) == vars.end()) {
		vars[varName] = 0;
	}
		return vars[varName];
}