C: Need to add 10 dollars to a total price for every so many miles traveled. How do I do this?

Asked Jun 14 '17 at 14:32

Active Jun 14 '17 at 15:24

Viewed 90 times

So the issue is I need to add 10 dollars for every 500 miles a product is shipped.

So I came up with this:

milesPricing = (miles/ 500) * 10

But I have to add 10 even if it's not 500 miles, for example, if they travel 700 miles, I'd need to add 10 for the first 500 and ten more cause the total goes over five hundred. How do I program this? I kept thinking for loop, but that would make me create an infinite loop to represent all possibilities unless I limit the loop and I doubt I can do this for the assignment.

Thank you.

edited Jun 14 '17 at 15:24

danglingpointer

4,708
3
24
42

asked Jun 14 '17 at 14:32

Lissette Ramos

1

`miles / 500 + 1`? – Some programmer dude Jun 14 '17 at 14:33
I don't understand how that would help here. – Lissette Ramos Jun 14 '17 at 14:35
1

You could also use `ceil` to round up so even if you have 600 miles, you'd get 1.2 which rounds up to 2. – Arc676 Jun 14 '17 at 14:36
2

Assuming integer arithmetic, `milesPricing = ((miles + 499) / 500) * 10;` – Ian Abbott Jun 14 '17 at 14:38
1

@Someprogrammerdude: You'd overcharge if it's exactly 500 miles. – Fred Larson Jun 14 '17 at 14:39
@Stargateur: No need for the ternary. `(miles / 500 + (miles % 500 != 0))` should work just fine. – Fred Larson Jun 14 '17 at 14:41
Note that the duplicate covers both 'round to nearest' and 'round up' (and the question included 'up' in the title for a long time). Ian Abbot showed the basic formula for rounding up. – Jonathan Leffler Jun 14 '17 at 14:42
@FredLarson I don't like mix boolean and integer type, even in C. Standard just say true is not zero :p. – Stargateur Jun 14 '17 at 14:42
1

@Someprogrammerdude: Use `(miles - 1) / 500 + 1`, or `(miles + 499) / 500`. One's subject to underflow; the other to overflow. – Jonathan Leffler Jun 14 '17 at 14:44
1

@Stargateur: Well, that's a matter of opinion. But I think you got the precedence wrong anyway. Need some parentheses. – Fred Larson Jun 14 '17 at 14:45
1

@Stargateur: The C++ standard says `true` converts to one, `false` converts to zero. See https://stackoverflow.com/a/5369783/10077 – Fred Larson Jun 14 '17 at 14:47
@FredLarson My bad you right `(miles / 500 + (miles % 500 != 0 ? 1 : 0)) * 10`. Thank for the quote about the standard. – Stargateur Jun 14 '17 at 14:53

C: Need to add 10 dollars to a total price for every so many miles traveled. How do I do this?

0 Answers0