Suppose a carpark charges a $2 minimum fee to park for up to 3 hours, then the carpark charges an additional $0.5 per hour for each hour. For example, park for 5 hours charge $2+$0.5+$0.5=$3
How should I calculate the fee use for loop?
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Not really sure what your question is about. Could you elaborate a bit?cllpse– cllpse2009-11-22 10:34:14 +00:00Commented Nov 22, 2009 at 10:34
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2 Answers
There's no need to use a for loop:
function calculateFee(hours) {
if (isNaN(hours) || hours <= 0) return 0;
if (hours <= 3) return 2;
var additionalHours = Math.round(hours - 3);
return 2 + 0.5 * additionalHours;
}
var fee = calculateFee(5);
And if using a for loop is a requirement:
function calculateFee(hours) {
if (isNaN(hours) || hours <= 0) return 0;
var result = 2;
if (hours <= 3) return result;
var additionalHours = Math.round(hours - 3);
for (i = 0; i < additionalHours; i++) {
result += 0.5;
}
return result;
}
And finally an example using objects:
function FeeCalculator(minimalFee, initialHours, additionalHourFee) {
if (isNaN(minimalFee) || minimalFee <= 0) { throw "minimalFee is invalid"; }
if (isNaN(initialHours) || initialHours <= 0) { throw "initialHours is invalid"; }
if (isNaN(additionalHourFee) || additionalHourFee <= 0) { throw "additionalHourFee is invalid"; }
this.minimalFee = minimalFee;
this.initialHours = initialHours;
this.additionalHourFee = additionalHourFee;
}
FeeCalculator.prototype = {
calculateFee: function(hours) {
if (hours <= this.initialHours) return this.minimalFee;
var additionalHours = Math.round(hours - this.initialHours);
return this.minimalFee + this.additionalHourFee * additionalHours;
}
};
var calculator = new FeeCalculator(2, 3, 0.5);
var fee = calculator.calculateFee(5);
Comments
May be like this, sorry If it is wrong, coz I didnt test it.
fee=0
if (hour>0){
fee=2;
hour-=3;
//without for loop
//if(hour>0)fee+=0.5*hour;
//with for loop
for(var i=0;i<hour;i++){
fee+=0.5;
}
}
return fee;
2 Comments
Alex Budovski
Put it in a do { ... } while(0); to make him happy.
YOU
yeah, thinking how to put for loop