MadanThangavelu/gist:2621df9cd1241087a630

## gistfile1.txt
  <html>
    <head>
      <title>Tip Calculator</title>
      <script type="text/javascript">
        function createTaxCalculator(taxPercentage){
			return {
            	evaluateTax: function(preTipCost){
            		return taxPercentage * preTipCost;
            	}
			}
        }


      	function createTipCalculator(tipPercentage){
			return {
            	evaluateTip: function(baseCost){
            		return tipPercentage * baseCost;
            	}
			}
      	}

      	function getUserPreferences(){
      		var baseCost = parseFloat(prompt("Enter the dollar value for your meal, pre-tax (e.g., $15.74): $"));
			var taxPercentage = parseFloat(prompt("Enter the tax rate as a percentage (e.g., 22): ")) / 100;
			var tipPercentage = parseFloat(prompt("Enter the percentage tip you'd like to leave (e.g., 15): ")) / 100;

      		return {
      			'baseCost' : baseCost,
				'taxPercentage' : taxPercentage,
				'tipPercentage' : tipPercentage
      		}
      	}

      	window.onload=function(){
      		var preferences = getUserPreferences();
      		var tipCalculator = createTipCalculator(preferences.tipPercentage);
      		var taxCalculator = createTaxCalculator(preferences.taxPercentage);

      		var taxValue = taxCalculator.evaluateTax(preferences.baseCost);
      		var preTipCost = taxValue + preferences.baseCost;
			var tipValue = tipCalculator.evaluateTip(preTipCost);

			var totalCost = preTipCost + tipValue;

			alert("Base Cost: " + preferences.baseCost + " Tax: " + taxValue.toFixed(2) + " Tip: " + tipValue.toFixed(2) + " TotalCost: " + totalCost.toFixed(2));

      	}
      </script>
    </head>
    <body>
      <p>Hey there! Let me calculate that for you.</p>
    </body>
  </html>
	<html>
	<head>
	<title>Tip Calculator</title>
	<script type="text/javascript">
	function createTaxCalculator(taxPercentage){
	return {
	evaluateTax: function(preTipCost){
	return taxPercentage * preTipCost;
	}
	}
	}


	function createTipCalculator(tipPercentage){
	return {
	evaluateTip: function(baseCost){
	return tipPercentage * baseCost;
	}
	}
	}

	function getUserPreferences(){
	var baseCost = parseFloat(prompt("Enter the dollar value for your meal, pre-tax (e.g., $15.74): $"));
	var taxPercentage = parseFloat(prompt("Enter the tax rate as a percentage (e.g., 22): ")) / 100;
	var tipPercentage = parseFloat(prompt("Enter the percentage tip you'd like to leave (e.g., 15): ")) / 100;

	return {
	'baseCost' : baseCost,
	'taxPercentage' : taxPercentage,
	'tipPercentage' : tipPercentage
	}
	}

	window.onload=function(){
	var preferences = getUserPreferences();
	var tipCalculator = createTipCalculator(preferences.tipPercentage);
	var taxCalculator = createTaxCalculator(preferences.taxPercentage);

	var taxValue = taxCalculator.evaluateTax(preferences.baseCost);
	var preTipCost = taxValue + preferences.baseCost;
	var tipValue = tipCalculator.evaluateTip(preTipCost);

	var totalCost = preTipCost + tipValue;

	alert("Base Cost: " + preferences.baseCost + " Tax: " + taxValue.toFixed(2) + " Tip: " + tipValue.toFixed(2) + " TotalCost: " + totalCost.toFixed(2));

	}
	</script>
	</head>
	<body>
	<p>Hey there! Let me calculate that for you.</p>
	</body>
	</html>