using uCalcSoftware;

var uc = new uCalc();
var uCalcA = new uCalc();
var uCalcB = new uCalc();
var uCalcC = new uCalc();

uCalcA.DefineVariable("MyVar = 'I was cloned from uCalcA'");
uCalcB.DefineVariable("MyVar = 'I was cloned from uCalcB'");
uCalcC.DefineVariable("MyVar = 'I was cloned from uCalcC'");

uCalcA.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));

uCalcB.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));

uCalcC.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));

Console.WriteLine("---");

// Now unsetting uCalc objects as default
uCalcC.IsDefault = false;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));

uCalcB.IsDefault = false;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));

uCalcA.IsDefault = false;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("MyVar"));