[messianic]

Tipping Waiters

Heres problem statement:

* The sum I pay must be round, i.e., divisible by 5.
* The tip must be between 5% and 10% of the final sum I pay, inclusive.

Clearly, sometimes there may be multiple "correct" ways of settling the bill.

Inputs:

* an int bill -- the amount I have to pay for the dinner
* an int cash -- the amount of money I have in my pocket

Write a function that computes how many different final sums satisfy the conditions above.

Heres the code I have so far:

public class TippingWaiters {		
	public int possiblePayments(int bill, int cash) { 
	
	int start=(int)(bill+.05*bill);
	int end=(int)(bill+.1*bill);
		
		
		if(start>cash)				
			start=cash;				
		if(end>cash)				
			end=cash;
		
		int count=0;
		
		
		for(int i=start;i<=end;++i)					
			if(i%5==0)								
				++count;							
		return count;								
	}
}

But I'm getting errors when compiling. For instance, with the inputs : 240 (bill) 279 (cash), the answer is 3 but the code gives me 2.

Can someone help

This post has been edited by messianic: 11 September 2009 - 06:46 PM

[mostyfriedman]

code tags please

[Locke]

messianic, on 11 Sep, 2009 - 07:19 PM, said:

But I'm getting errors when compiling.

Which are...?

And, as mostyfriedman said, .

This post has been edited by Locke: 11 September 2009 - 06:47 PM

[mostyfriedman]

btw there's no need for type casting here


edit: dunno what's wrong with me tonight

This post has been edited by mostyfriedman: 11 September 2009 - 07:32 PM

[messianic]

what does type casting mean?

Can you help me out on my code

[messianic]

I honestly do not know what is wrong with my code. When I do it manually, i find that the number i get working with my code is the right answer, but for some reason when I run it it gives back a wrong answer

[mostyfriedman]

int start=(int)(bill+.05*bill);

the (int) is called type casting..

Quote

But I'm getting errors when compiling. For instance, with the inputs : 240 (bill) 279 (cash), the answer is 3 but the code gives me 2.

i dont really see any compilation errors.. what exactly are you trying to do?

int end=(int)(bill+.1*bill);

it should be 0.01 instead of 0.1

[messianic]

well 10% should be .1 correct?

And are you saying I should delete int? Should I replace it with something

And I run my code in a program that feeds in input and I am getting wrong answers for some of them.

[Locke]

mostyfriedman, on 11 Sep, 2009 - 08:12 PM, said:

it should be 0.01 instead of 0.1

Not true...10% is .1.

[messianic]

Locke, could you please help me figure this out?

Basically, when i input the numbers manually and figure it out, the code should give the right answers, but somehow when I run it through the program the code is giving wrong answers. Im kinda in a dead end

[mostyfriedman]

Locke, on 11 Sep, 2009 - 06:15 PM, said:

mostyfriedman, on 11 Sep, 2009 - 08:12 PM, said:

it should be 0.01 instead of 0.1

Not true...10% is .1.

ah yea right..crap, brain overflow again

[mostyfriedman]

i also ran it by hand and start will be 252, end will be 264..only 255 and 260 are divisible by 5 so the output is 2

[messianic]

is this supposed to be a help forum

[Locke]

Yes...but sadly, you haven't given much information...

But from what I can tell, I don't see why it's going wrong.

[messianic]

here are other constraints that might help:

Assume that both bill and cash are in dollars
All the money I have is in one-dollar banknotes.

Here are some examples:

1234567 (bill), 12345678 (cash); answer = 14440

Anyone please