Can someone see why my last event in Duct Tape challenge dosent want to be true?

Question

Here is my code:

https://code.sololearn.com/cK1Xpo1rFS4i/?ref=app

Answer 1

Manually adding 0.5 is not guaranteed to round the number up, but you will always need to buy a full roll of duct tape even if a portion would be sufficient. You could use the standard ceil() function instead:

#include <cmath>

...
numberRollTSI = ceil(numberRollOS * 2);

Answer 2

Shadow

Worked!

If you have the time, can you explain what this function does?

I want to understand this function so I can use it on other code.

Answer 3

It simply rounds a decimal number up to the nearest integer, e.g.

ceil(0.1) = 1
ceil(0.5) = 1
ceil(1) = 1
ceil(-0.5) = 0

See:

https://en.cppreference.com/w/cpp/numeric/math/ceil

There are similar functions for rounding down, rounding to the closest integer, etc. in the standard library.

Answer 4

Shadow

Alright! I understand now.

thank you so much for your help!