Solved

How could I convert integer to string?

Posted on 2011-03-02
6
487 Views
Last Modified: 2012-05-11
Dear,

What is the function used to convert integer to string in C/C++?

currently, in delphi we have inttostr function.

Nabil.
0
Comment
Question by:nabilhammoud
6 Comments
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 35024590
itoa and ltoa (and variants for wide strings).
0
 
LVL 40

Accepted Solution

by:
evilrix earned 125 total points
ID: 35024710
EE's very own DanRollins has written a good article on this very subject...

"Convert String to int / Convert int to String in C++"
http://www.experts-exchange.com/Programming/Languages/CPP/A_1577-Convert-String-to-int-Convert-int-to-String-in-C.html
0
 
LVL 32

Assisted Solution

by:phoffric
phoffric earned 125 total points
ID: 35024718
itoa may or may not be part of your system as it is not in the standard library. If you wish to do this in C++, here is an example that shows how to do it.
      http://www.cplusplus.com/reference/iostream/istringstream/istringstream/
// using istringstream constructors.
#include <iostream>
#include <sstream>
#include <string>
using namespace std;

int main () {

  int n,val;
  string stringvalues;

  stringvalues = "125 320 512 750 333";
  istringstream iss (stringvalues,istringstream::in);

  for (n=0; n<5; n++)
  {
    iss >> val;
    cout << val*2 << endl;
  }

  return 0;
}

Open in new window

0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 33

Expert Comment

by:sarabande
ID: 35025725
the sample phoffric provided converts string to integer. you need to use ostringstream for the reverse conversion:

   std::ostringstream oss;
   int i = 12345;
   oss << i;
   std::string si = oss.str();

if you need char array the last statement turns to

  const char * pcs = oss.str().c_str();

Sara
0
 

Expert Comment

by:tomnov
ID: 35025776
int val = 10;
char buff[10];
int radix = 10;

itoa(val, buff, radix);

printf("value: %s\n", buff);

//prints value: 10
0
 

Author Closing Comment

by:nabilhammoud
ID: 35025910
THX
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
Examines three attack vectors, specifically, the different types of malware used in malicious attacks, web application attacks, and finally, network based attacks.  Concludes by examining the means of securing and protecting critical systems and inf…
The goal of this video is to provide viewers with basic examples to understand and use conditional statements in the C programming language.
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.

839 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