How do I input 5 digits in a single line then add all the digits that are inputted?

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Ex. Enter 5 digits: 12345

1+2+3+4+5

please help me I'm still a students and wants to learn more from the experts, thanks :)

Posted 12-Dec-14 2:07am

Jacob Cosare

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Comments

ZurdoDev 12-Dec-14 8:09am

Where are you stuck? Are you doing this as a console app or as a windows forms app?

Jacob Cosare 12-Dec-14 8:25am

this is just a console application... the teacher only taught us about ReadLine and ReadKey not about parses so we don't know what to do

Maciej Los 12-Dec-14 8:09am

What have you tried? Where are you stuck?
[EDIT]
It's quite simple: you need to loop through the collection of numbers and add each other. That's all.

Jacob Cosare 12-Dec-14 8:27am

How can I loop them if the numbers aren't consequent?

Pheonyx 12-Dec-14 8:11am

well, the best way to learn is to try things and then ask rather than just ask.
So let's start with:
1) What type of application are you making?
2) What have you tried?
3) Have you got to the point where you are reading in characters?
4) Have you looked at String.Split on the MSDN site?
5) Have you looked at Int32.Parse or Int32.TryParse (again from the MSDN)

Jacob Cosare 12-Dec-14 8:26am

I tried then it's just way too far from my logic so I need some expert's advice.. this is just a console application... the teacher only taught us about ReadLine and ReadKey not about parses so I don't know what to do

Shweta N Mishra 12-Dec-14 8:28am

what if you enter 2 digit number, how you wanna add it

like this 1+2+3+4+25 or 1+2+3+4+2+5 ?

Jacob Cosare 12-Dec-14 9:06am

the 2nd one please help me I guess you have the idea :)

Praveen Kumar Upadhyay 12-Dec-14 8:30am

What will be your digits separator? How will you separate the digits.

2 solutions

Solution 2

Solution1 by OriginalGriff is excellent!

When you finish learning about basics, you'll be still interested of programming, i'd suggest to read about Linq[^]. It's very interesting language ;)

C#

string s = "12345";
int sumOfDigits = s.Select(c=>Convert.ToInt32(c.ToString())).Sum();
Console.WriteLine("Sum of digits: '{0}' is {1}", s, sumOfDigits);
//or 
//as OriginalGriff suggested
sumOfDigits = s.Select(c=>Convert.ToInt32(c-'0')).Sum();
Console.WriteLine("Sum of digits: '{0}' is {1}", s, sumOfDigits);

Posted 12-Dec-14 2:45am

Maciej Los

Comments

Jacob Cosare 12-Dec-14 10:03am

Thank you so much for this code I'm going to study this code and I sure will enhance this as long as I live :)

Maciej Los 12-Dec-14 10:40am

You're very welcome ;)

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OriginalGriff · Accepted Answer · 2014-12-12T02:26:00

There are three parts to this:
1) Read the line of text - this is trivial, and I assume you know how to do that.
2) Add the digit values together
3) Print the result - again this is trivial.

The middle bit is a little complicated to think about, but it's really pretty easy:
1) Set up a "total" variable, and start it at zero.
2) Loop through each character in the input.
2.1) If the character isn't a digit, ignore it, or report a problem and stop.
2.2) Otherwise, convert it to an integer value. This sounds complicated, but it isn't:

C#

char c = '2';
int x = (int) (c - '0');

Will leave the value two in the variable x
2.3) Add the new value into the total
2.4) Repeat for next character at (2) until you run out of characters.

And the loop is realy easy:

C#

foreach (char c in myInputString)
   {
   ...
   }

So give it a try, and see how far you get. It's pretty simple now you have all the pieces.