index of same digits in any number

Question

HI!!!!!!!!!

How can I find the index of same digit which is at diffrent postion in any given number(number can be of any length)....
Like we have any number, suppose, 982625
How can we find the index of two 2s in this number.........
I have made a form in which there are two textboxes.In first ,i am entering number(which is 982625) and in second one I am entering the digit(i.e. 2)...
Can anyone provide me C# code for finding index values.............

Kirtan Patel · Answer

Here is What you Want and please mark my post as answer :) it will help me to gain some credit :) Thank you . .csharpcode .csharpcode pre { font-size: small; color: black; font-family: Consolas Courier New Courier Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } private void button1_Click( object sender EventArgs e) { char [] CharArray = textBox1.Text.ToCharArray(); char n = Convert.ToChar(textBox2.Text.Trim()); double Final=0; int crev=0; int reapeat = 0; for ( int i = CharArray.Length - 1; i >= 0; i--) { int num = Convert.ToInt32(textBox2.Text.Trim()); if (CharArray[i] == n) { Final = Final + num * (Math.Pow(10crev)); reapeat++; } crev++; } if (reapeat > 2) { MessageBox.Show( You Cant repeat Specific digit More Then 2 Time ); } else { MessageBox.Show( Answer is :=  + Final); } }

Kirtan Patel · Answer

Hi Vinni Constructed your Logic :) .csharpcode .csharpcode pre { font-size: small; color: black; font-family: Consolas Courier New Courier Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } private void button1_Click( object sender EventArgs e) { char [] CharArray = textBox1.Text.ToCharArray(); char n = Convert.ToChar(textBox2.Text.Trim()); double Final=0; int crev=0; for ( int i = CharArray.Length - 1; i >= 0; i--) { int num = Convert.ToInt32(textBox2.Text.Trim()); if (CharArray[i] == n) { Final = Final + num * (Math.Pow(10crev)); } crev++; } MessageBox.Show( Answer is :=  + Final); } Dont Forget to mark it as Answer Please :)

vinni jain · Answer

hi  Kirtan....... I need ur help.......... plz can u help me in my Question inserting values in table .........

vinni jain · Answer

thanks a lot

Kirtan Patel · Answer

Here is Your Full Code With Repeat Detection :) and Fully Tested .csharpcode .csharpcode pre { font-size: small; color: black; font-family: Consolas Courier New Courier Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } //Function to Check if character is Present More than Twise public bool checkReapeat( char c string str) { int reapatcount = 0; int i= 0; bool isReapeat = true ; Char[] CharArray = str.ToCharArray(); for (i = 0; i { if (CharArray[i] == c) { reapatcount++; } } if (reapatcount { isReapeat = false ; } else { isReapeat = true ; } return isReapeat; } // Use the Above function and Do our Work .csharpcode .csharpcode pre { font-size: small; color: black; font-family: Consolas Courier New Courier Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } private void button1_Click( object sender EventArgs e) { char [] CharArray = textBox1.Text.ToCharArray(); bool ReapeatisThere = true ; //Scanning for Reapeated Digits foreach ( char charac in CharArray) { ReapeatisThere = checkReapeat(charactextBox1.Text.Trim()); if (ReapeatisThere == true ) { break ; } } //Proceed Further if No Reapeted Digits Found if ( ReapeatisThere == false ) { char n = Convert.ToChar(textBox2.Text.Trim()); double Final=0; int crev=0; int reapeat = 0; for ( int i = CharArray.Length - 1; i >= 0; i--) { int num = Convert.ToInt32(textBox2.Text.Trim()); if (CharArray[i] == n) { Final = Final + num * (Math.Pow(10crev)); reapeat++; } crev++; } MessageBox.Show( Answer is :=  + Final); } else { MessageBox.Show( Repeated Digits Found in Number !! ); } } Happy Coding :)

vinni jain · Answer

I am new to this website... can u plz tell me how to mark it as answer

vinni jain · Answer

thank u very much for ur gr8 help..... Can U tell me one more thing...As I am making codes I am testing it for all possible values...In some cases I want to handle exceptions and display error message.....Like In above code which u gave me I want that If user repeates any digit more than twice then computer should display error message as Enter correct number..........Like this how can I display error messages in other codes too.

vinni jain · Answer

If suppose we enter any number suppose 2724 in textbox1 and in textbox2 if user enter 2 (we have enter digit whose placevalue is to be found)...In combobox we select +. On button click I want the answer to be (2*1000)+(2*10)=2000+20=2020... I tried to make code for this logic but i think its incorrect also its giving errors...

Kirtan Patel · Answer

Can you Explain a bit more what your code does ? or what you want to Achieve ?

vinni jain · Answer

hi!!! The code which I am using for placevalue is as follows: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace PV { public partial class Form1 : Form { string aa; string co1; int a; int c; int i; int di; int f; int d1; public Form1() { InitializeComponent(); } void retfirst(string x) { int o; aa = this.textBox1.Text; o = aa.IndexOf(x); a = Convert.ToInt32(o); } public void aaaa() { retfirst(this.textBox2.Text); c = (aa.Length) - 1; co1 = 1; i = (c - a); while (i > 0) { co1 = (co1 + 0); i = (i - 1); } di = int.Parse(co1); f = int.Parse(this.textBox2.Text); d1 = (f * di); } private void button1_Click(object sender EventArgs e) { aaaa(); this.textBox3.Text = d1.ToString(); this.textBox3.Enabled = true; } Now the problem is that I could not integrate ur and mine code togetherbecause here I have to find palcevalue of single digit in a number but when I apply loop (which u gave me)in that case how will I apply code for placevalue for occurence of same digit second time ..... Can u please help me in joining codes together for finding placevalue of any digit which is occuring twice in a number...

Kirtan Patel · Answer

if i understood Correct you want to sum all those found Indexed Values then here is Code string s = textBox1.Text; int total = 0; char[] chararray = s.ToCharArray(); for (int i = 0; i { if (chararray[i] == '2') { total = total + int.Parse(chararray[i].ToString()); } } MessageBox.Show(Total is :=  + total);

vinni jain · Answer

Now after finding index how can I find palcevalue of numbers at each index and then find sum or difference.... for finding placevalue I have made a function but can't use it with the function which u provided .... How can I amke such application in C#

Anurag Gupta · Answer

thanks a lot Kirtan

Kirtan Patel · Answer

This Will Find Index of All 'a' in String you can find number using same logic string s = textBox1.Text; char[] chararray = s.ToCharArray(); for (int i = 0; i { if (chararray[i] == 'a') { listBox1.Items.Add(i); } } Happy coding :)

Eamonn · Answer

The easiest way is probably to use the String.IndexOf() method; string inputNumber = InputNumberTextBox.Text; string inputDigit = InputDigitTextBox.Text; int index = inputNumber.IndexOf(inputDigit);