I have 2 textbox and 1 button .Assume that I input in textbox 1 "aaa gdds aaa dfdfdfgggg aaa" and in textbox 2 "aaa".When I click the button, there will be a message
The number of occurence string "aaa" in textbox 1 is : 3
Could you give me the code by c#
Thank

string sa = new string[] { textbox2.Text )
int howMany = textbox1.Text.Split( sa, StringSplitOptions.None ).Length - 1

khb3283,

This sounds like a homework assignment.

What about if the value of textbox 1 is "aaaaaaaaaaaa"?
Should the answer be 0, 4 or 10?

-Peter
compiledthoughts.com

Yeah, it's surely homework. I was just too lazy to chide him/her for not at least trying. Shame on me.

I like your question!

What about if the answer should be 1? <grin style="evil"/>

My vote is for 0 occurences...

Dr. Purdum

Jack Purdum, Ph.D.
Author: Beginning C# 3.0: Introduction to Object Oriented Programming (and 14 other programming texts)

I don't think we get to vote. I think the instructor who assigned that homework is in control.

In real world usage, though, I think the answer should be either zero or one.

"Find how many times a given word [including inflections] appears in a given string."

If the [including inflections] is in there, then 1 (e.g., "ants" vs. "ant", "singing" vs. "sing"). If not, then 0.

(Sort of. Yes, I know, "there" is NOT an inflection of "the". And "sang" is an inflection of "sing." But if you want to get that nit-picky, then we'll have to incorporate an English-language dictionary in the answer.)

Aren't we having fun with poor khb3283?

**********

p.s.: A friend of mine wants to know: When are you going to write a VB version of that book? She's willing to tackle it as is, but her "shop" uses VB.NET exclusively. She's a competent ASP developer (VBScript, JavaScript, HTML, SQL) but is drowning in OO.

Why are you teasing the OP so much instead of helping him? The answer is of course extremely easy:

protected void Button1_Click(object sender, EventArgs e)
{
MessageBox.Show("The number of occurence string \"aaa\" in textbox 1 is : 3");
}

And lot easier if you ask me, and removes the need for any counting at all.

Imar


---------------------------------------
Imar Spaanjaars
http://Imar.Spaanjaars.Com
Everyone is unique, except for me.
Author of Beginning ASP.NET 3.5 : in C# and VB, ASP.NET 2.0 Instant Results and Dreamweaver MX 2004
Want to be my colleague? Then check out this post.

ROTFLMAO.

Now, the question is, *which* "OP" was Imar referring to?

After all, my initials are "OP".

<snicker/>

KHB3283:

You know "planoie" posted the only truly correct answer here, so far.

That is, you haven't defined the problem well enough for anybody to give a definitive answer. Now, this is quite possibly because your instructor didn't give you a good and full problem description.

If so, show you are smart and go back and ask him or her Planoie's question. Rephrasing it, it would read:

What about if the value of textbox 1 is "aaaaaaaaaaaa" and textbox 2 is "aaa"?
Should the answer be 0, 1, 4 or 10? Or what?

*ALL* of those answers could be correct, depending on how the instructor wants to define the problem.

I misread the second post...my bad. Also, I would think one should increment an index so the second compare is past the first match. (I'm pretty sure the Boyer-Moore algorithm works this way.) In that case, I would think that, if the question is:

What about if the value of textbox 1 is "aaaaaaaaaaaa" and textbox 2 is "aaa"?

the answer should be 4.

Dr. Purdum


Jack Purdum, Ph.D.
Author: Beginning C# 3.0: Introduction to Object Oriented Programming (and 14 other programming texts)