How to combine integers in c#

Question

Im looking for a way to combine my integers together. I got 3 integers i want to make one from them.

All the integers are holding a time currency wich looks a little like this:

var date = DateTime.Now;
int timeHours = date.Hour;

I got the Hours, Minutes and Seconds and want to combine so they would look like this:

Hour : Minutes : Seconds

How can i combine the integers together to do that.

Note: I've looked on the internet but i could not get the information i was looking for.

This is what i looked at:

Combine two integers to create a unique number

How to combine 2 integers in order to get 1?

Why do you want to combine them in a single integer, rather than having a type to represent "time of day" or something similar? What do you mean by "they would look like this"? An integer doesn't "look" like three values separated by colons... — Jon Skeet, Jun 09 '15 at 07:56
What's your exact requirement, this can be achieved using string concat. Anyway an integer cannot have ":" in it, so you need string — Mrinal Kamboj, Jun 09 '15 at 07:58
I think your asking a way to get the current time am i right? — , Jun 09 '15 at 07:59
I think i need to go for the option Giorgi Nakeuri gave. Did not think that would work. — The_Monster, Jun 09 '15 at 08:02
@JonSkeet Yes i want to show the current time for in my console application — The_Monster, Jun 09 '15 at 08:02
Here is my guess, he just wants this: `DateTime.Now.ToString("HH:mm:ss")` — Tim Schmelter, Jun 09 '15 at 08:04
@TimSchmelter Yes thats what i want but i didnt know you could do it like that — The_Monster, Jun 09 '15 at 08:05
@TimSchmelter Wouldn't be better to use as `H:m:s` format? Sounds like (not sure!) OP wants to get single digits _without_ leading zero? Like `5` instead of `05` or something :) — Soner Gönül, Jun 09 '15 at 08:06
@SonerGönül: i don't know what OP wants, i would prefer `10:07:46` to `10:7:46` — Tim Schmelter, Jun 09 '15 at 08:09
This is why it's important to provide context when you ask a question - you weren't really interested in combining integers, you were interested in converting a date/time to a string. — Jon Skeet, Jun 09 '15 at 08:19
There are countless duplicates, you just have to search with the right terms. Then you find questions like [this](http://stackoverflow.com/questions/10341886/get-date-time-hours-and-minutes-with-leading-zero). — Tim Schmelter, Jun 09 '15 at 08:23

Soner Gönül · Answer 1 · 2015-06-09T08:12:51.197

3

Combining these integers will generate a string, not an another integer. You can easily format your DateTime with ToString() method like;

var str = DateTime.Now.ToString("H':'m':'s"); // eg: 11:0:2

If you wanna get your hour, minute and second part with leading zeros for single digits, you can use HH:mm:ss format instead.

var str = DateTime.Now.ToString("HH':'mm':'ss"); // eg: 11:00:02

edited Jun 09 '15 at 08:12

answered Jun 09 '15 at 07:59

Soner Gönül

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I believe you don't need quotes here - just `H:m:s` will do the job – Sergey Berezovskiy Jun 09 '15 at 08:13
@SergeyBerezovskiy It depends on what OP's `CurrentCulture` is. `:` character (which is [`TimeSeparator`](https://msdn.microsoft.com/en-us/library/system.globalization.datetimeformatinfo.timeseparator%28v=vs.110%29.aspx)) has a special meaning as _replace me with current culture or supplied culture time separator_. That means if OP's current culture has a different time separator than `:`, output string will be different format. I know there are only 5 framework culture that has `.` as a time separator, _still_ there is a chance. – Soner Gönül Jun 09 '15 at 08:18
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you are very globalize-able :) – Sergey Berezovskiy Jun 09 '15 at 09:20
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@SergeyBerezovskiy Believe me, I wish I couldn't :) – Soner Gönül Jun 09 '15 at 09:59

score 2 · Answer 2 · answered Jun 09 '15 at 07:57

2

DateTime.Now already contains all information you need, date and time. All you need to do is format this information

answered Jun 09 '15 at 07:57

Melvin

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Dmitry Bychenko · Answer 3 · 2015-06-09T08:01:56.073

2

There're many ways to pack two (or many) integers into one based on their ranges, e.g.

  int i1 = 123;
  int i2 = 456;
  // two 32-bit integers into 64-bit one
  long result = (((long) i1) << 32) | i2;

In your particular case

  int hours = 5;
  int minutes = 10;
  int seconds = 59;

  int combined = hours * 3600 + minutes * 60 + seconds;

reverse:

  int combined = 12345;

  int seconds = combined % 60;
  int minutes = (combined / 60) % 60;
  int hours = combined / 3600;

edited Jun 09 '15 at 08:01

answered Jun 09 '15 at 07:58

Dmitry Bychenko

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@GiorgiNakeuri In fairness, the question can not be solved exactly as asked - "I got 3 integers **i want to make one from them**." - This solves that, and is what I'd assumed was wanted too. – Octopoid Jun 09 '15 at 08:32

score 1 · Answer 4 · answered Jun 09 '15 at 07:59

1

you can try the below code i think it's useful

       var date = DateTime.Now;
        var result = date.Hour + ":" + date.Minute + ":" + date.Second;
        Console.WriteLine(result);

answered Jun 09 '15 at 07:59

Ashokreddy

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I've tried that, in this case they is it as a calculation – The_Monster Jun 09 '15 at 08:04
So they will summ up the values – The_Monster Jun 09 '15 at 08:12

Lorentz Vedeler · Answer 5 · 2015-06-09T08:07:33.527

1

A simple way using the base 10 number system is to just

var number = hours * 10000 + minutes * 100 + seconds

this returns a number like 150936 for 15:09:36

To convert back:

seconds = number % 100
minutes = (number / 100) % 100
hours = number / 10000

Note that this is obviously not the most efficient approach, but simple

edited Jun 09 '15 at 08:07

answered Jun 09 '15 at 08:02

Lorentz Vedeler

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Giorgi Nakeuri · Accepted Answer · 2015-06-09T08:14:30.500

You should cast to string with format function for example:

string result = string.Format("{0:00}:{1:00}:{2:00}", timeHours, timeMinutes, timeSeconds);

Just to be complete:

format HH:mm:ss:

string result = string.Format("{0:00}:{1:00}:{2:00}", timeHours, timeMinutes, timeSeconds);

string result = DateTime.Now.ToString("HH:mm:ss");

format H:m:s:

string result = string.Format("{0}:{1}:{2}", timeHours, timeMinutes, timeSeconds);

string result = DateTime.Now.ToString("H:m:s");

How to combine integers in c#

6 Answers6