Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Copy N number of chars from the string...

Posted on 2000-04-08
1
Medium Priority
?
251 Views
Last Modified: 2013-11-20
Hi
I got this problem i need to copy a substring from position i set...
something like that..

char * copy(char *str,int pos,int n);

str-oridinal string
pos- position of the char to start,
n-number of chars to copy from that pos.
and the function returns the subtring//

is there such function in Visual C++?

if there is pls tell a\meabout it.
0
Comment
Question by:yans
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 11

Accepted Solution

by:
mikeblas earned 20 total points
ID: 2696435
> is there such function in Visual C++?

There is no such function built-in.  It's easy to write, though.

Note that I coded your function to allocate a new string and then copy the substring into the newly allocated memory. I suppose you could modify the original string in place, but that's not what I chose to do.

For only five points, you get no choice in the matter.

--- begin file substr.cpp ---

// compile with:
//     cl /W4 substr.cpp

#include <windows.h>
#include <stdio.h>

char* copy(const char* pstr, int nPos, int nLen)
{
   if (nPos < 0 || pstr == NULL)
      return NULL;

   char *pstrReturn;

   if (nPos > lstrlen(pstr))
   {
      pstrReturn = new char[1];
      *pstrReturn = 0;
   }
   else
   {
      pstrReturn = new char[nLen + 1];
      lstrcpyn(pstrReturn, pstr + nPos, nLen + 1);
   }

   return pstrReturn;
}

void main()
{
   char* pstrSubString = copy("Hockey is just like life", 10, 9);

   printf("substring is \"%s\"\n", pstrSubString);

   // remember to return the string we allocated!
   delete [] pstrSubString;

   return;
}

--- end file substr.cpp ---

..B ekiM
0

Featured Post

Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
In this post we will learn different types of Android Layout and some basics of an Android App.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question