reverse number in c# from number A to number B

Question

2.00/5 (6 votes)

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Hello
i want code for reverse number in c# from number A to number B
for Example : 101 ~ 105 (101-102-103-104-105) ( a = 101 , b = 105 )
reverse number: 101 , 201 , 301 , 401 ,501

and i know this code only for reverse one number

C#

int a = Convert.ToInt16(txt1.Text);
while (a != 0)
{
   r = r * 10 + (a % 10),r=0;
   a = a / 10;
}

now what can i do ?
Regards.

--------------------------
i want complete code ! i think i need to use from "for" but i don't know how :D i test this

C#

int a = Convert.ToInt16(txt1.Text), b = Convert.ToInt16(txt2.Text);
            int r = 0;

            for (int i = a; i <= b; i++)
            {
                while (a != 0)
                {
                    r = r * 10 + (a % 10);
                    a = a / 10;
                }
                lblshow.Text += r + " , ";
            }

but this is not work ...!!! :(

for Example :
a = 101 in textbox1
and
b = 105 in textbox2

and i want show in lbl
101 , 201 , 301 , 401 , 501

Posted 22-Aug-12 2:40am

mehrdad1991h

Updated 22-Aug-12 3:48am

Dave Kreskowiak

v6

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Comments

AshishChaudha 22-Aug-12 8:45am

you know the code then what your problem is??

ridoy 22-Aug-12 8:46am

you need to apply your logic..if we give solution to you then your logic willn't be developed.

bbirajdar 22-Aug-12 8:46am

Hint: Add this while loop inside another for loop...

I.explore.code 22-Aug-12 8:57am

you almost have the solution, all u need to do simple string manipulation and concatenation and that's it!

mehrdad1991h 22-Aug-12 9:38am

I don't want use from string !
I have solution, But this is not complete / correct i know i must use from while an for both but i can't ! i use but that is not work !

I.explore.code 22-Aug-12 10:27am

I would accept Santosh Kumar J's solution below, the guy has pretty much written the code for you. Its really not that complicated.

mehrdad1991h 22-Aug-12 10:45am

i found solution ; I don't use from String !
I send solution you can see ...!
Thanks for help

3 solutions

Solution 1

What you have to do is split string for some character, in your case, its '-' and save it in array and for array count, pass each element in your reverse method..

For eg.

C#

string s = "101-102-103-104-105";
   
    string[] numbers= s.Split('-');
    foreach (string num in numbers )
    {
       int a = Convert.ToInt16(num);
        int result=0;
     do
     {
         result = (result * 10) + (a% 10);
         a= a/ 10;
     }while (a> 0);
    
    Console.WriteLine(result);
    }

Posted 22-Aug-12 2:48am

Santhosh Kumar Jayaraman

Updated 22-Aug-12 2:57am

v2

Comments

I.explore.code 22-Aug-12 10:35am

I would take this as a solution! And just use a little bit of my own work to make it sing to my tune in no time! My 5!

Solution 2

As it is a logical problem i refer you to do it by yourself.you can solve it as you can do it for one number.i give you one trick,apply this one number logic to every number of a 3 digit number.only you need to customize it when it is 0 otherwise for every case it is same.You can use loop to do it.
Ok,if you fail in your try then see it..
http://wiki.answers.com/Q/Write_a_program_in_c_language_to_reverse_a_three_digit_integer_number_without_using_loops[^]

Posted 22-Aug-12 2:50am

ridoy

Updated 22-Aug-12 2:52am

v2

Comments

Vani Kulkarni 22-Aug-12 9:03am

Good link! My 5!

ridoy 22-Aug-12 12:08pm

thanks Vani

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mehrdad1991h · Accepted Answer · 2012-08-22T04:43:00

I found solution :D and i don't use from string method :D
I want This code....

C#

{
    int a = Convert.ToInt16(txt1.Text), b = Convert.ToInt16(txt2.Text);
    int r = 0,s=0;
    lblshow.Text = null;

    for (int i = a; i <= b; i++)
    {
        s = i;
        while (s > 10)
        {
            r = r * 10 + (s % 10);
            s = s / 10;
        }
        r = r * 10 + (s % 10);
        lblshow.Text += r + " , ";
        r = 0;
    }
}

reverse number in c# from number A to number B

3 solutions

Solution 1

Solution 2

Solution 3

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