Reversing content of a TEdit

Hi folks, I'm studying C++ and I couldn't find on the net any reference by about how I would go about doing this, so any help would be appreciated.

What I need is to have the data typed into the text edit box  inverted and shown on another box when one pressed a button.

So if one typed on one box "123456" when pressed the button the other box would show "654321".

Thanks.
Rodric MacOliverResearcherAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Subrat (C++ windows/Linux)Software EngineerCommented:
Get the content into string and do a reverse of it and then display it on another editbox.
What IDE you are using. I hope you are using Builder XE.
0
Subrat (C++ windows/Linux)Software EngineerCommented:
for reversing you can use std::reverse(),
String text = textbox1.text;
std::string str = text.c_str();
std::reverse(str.begin(), str.end());

onclick() event, add the reversed string to text property of textbox2
i.e,
textbox2.text = reversedString;

I don't have Builder XE. So can't give you exact code. But the given code can help you to proceed.
0
Rodric MacOliverResearcherAuthor Commented:
Subrat, I'm using XE6 C++ Builder. I couldn't make it work, I'm getting two errors:

[bcc32 Error] Unit1.cpp(26): E2285 Could not find a match for 'string::basic_string(const string&)'
  Full parser context
    Unit1.cpp(24): parsing: void _fastcall TForm1::Button1Click(TObject *)


and

[bcc32 Error] Unit1.cpp(27): E2316 'reverse' is not a member of 'std'
  Full parser context
    Unit1.cpp(24): parsing: void _fastcall TForm1::Button1Click(TObject *)


Here is my code:
//---------------------------------------------------------------------------

#include <vcl.h>
#include <string>
#include <cstdlib>
#include <sys/types.h>
#include <stdio.h>
#include <cstring>
#pragma hdrstop

#include "Unit1.h"
using namespace std;
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
	String textVariable = Edit1->Text;
	std::string str = textVariable.c_str();
	String reversedString = std::reverse(str.begin(), str.end());
	Edit2->Text = reversedString;
}
//---------------------------------------------------------------------------

Open in new window

0
Subrat (C++ windows/Linux)Software EngineerCommented:
I will post you the code after 2hrs.
0
Subrat (C++ windows/Linux)Software EngineerCommented:
1. TEdit->Text returns UnicodeString
2. I don't think there is any inbuild API to reverse the string in UniCodeString class.
3. So we converts UnicodeString to std::wstring/std::string by using _wstr() or c_str().
4. Now we can reverse the string using reverse algorithm. i.e std::reverse(). You need to include "string" and "algorithm" to make the whole thing to work.
5. Now string is reversed and we will convert it to UnicodeString by using wcstombs(). Because TEdit->Text needs UniCodeString.
6. Here I have created separate function ToUniStr() to convert wstring to UniCodeString. This can be reusable where ever needed.

#include "string"
#include "algorithm"


// Convert wstring to UnicodeString
String ToUniStr(const std::wstring &str)
{
   char *cBuf = new char[str.length()+1];
   memset( cBuf, 0, str.length()+1);

   wcstombs(cBuf, str.c_str(), str.length());

   String aBuf = cBuf;
   delete[] cBuf;
   return aBuf;
}


//---------------------------------------------------------------------------
void __fastcall TForm2::Button1Click(TObject *Sender)
{
   String str1 = Edit1->Text;
   std::wstring wstr = str1.w_str(); // str1.c_str() is also OK here

   // Reverse the string
   std::reverse(wstr.begin(), wstr.end());

   String str2 =  ToUniStr(wstr);
   Edit2->Text = str2;

}

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.