using uCalcSoftware;

var uc = new uCalc();

static void OutputAnswerCB(uCalc.Callback cb) {
   cb.ReturnStr("Answer: " + cb.ArgStr(1));
}
static void OutputSymbolCB(uCalc.Callback cb) {
   cb.ReturnStr("==> " + cb.ArgStr(1));
}
static void OutputBoolCB(uCalc.Callback cb) {
   if (cb.ArgStr(1) == "false") {
      cb.ReturnStr("No");
   } else if (cb.ArgStr(1) == "true") {
      cb.ReturnStr("Yes");
   }
}


// This format inserts "Answer: " in front of every result
var OutputAnswer = uc.Format( OutputAnswerCB);
Console.WriteLine(uc.EvalStr("10+20"));
Console.WriteLine(uc.EvalStr("'Hello '+'world'"));
Console.WriteLine(uc.EvalStr("5 > 10"));
Console.WriteLine("---");

// This one inserts ==> in front of the result
// The previously defined "Answer: " output is still prepended as well
var OutputSymbol = uc.Format( OutputSymbolCB);
Console.WriteLine(uc.EvalStr("10+20"));
Console.WriteLine(uc.EvalStr("'Hello '+'world'"));
Console.WriteLine(uc.EvalStr("5 > 10"));
Console.WriteLine("---");

// Causes Boolean values to return Yes or No (instead of true or false)
var OutputBool = uc.Format( OutputBoolCB, "Bool");
Console.WriteLine(uc.EvalStr("10+20"));
Console.WriteLine(uc.EvalStr("'Hello '+'world'"));
Console.WriteLine(uc.EvalStr("5 > 10"));
Console.WriteLine(uc.EvalStr("5 < 10"));
Console.WriteLine("---");

// The previously defined "==>" output is removed
OutputSymbol.Release();
Console.WriteLine(uc.EvalStr("10+20"));
Console.WriteLine(uc.EvalStr("'Hello '+'world'"));
Console.WriteLine(uc.EvalStr("5 > 10"));
Console.WriteLine(uc.EvalStr("5 < 10"));