post  Convert integer to string

Oromis (73)   Link to this post
Probably a commen question, but I can't find a good answer: how to convert an integer to a string?

I came across several solutions. I can't get stringstream to work. The function sprintf() gave problems to, and it's c-style. The function itoa() worked fine, but the reference says
This function is not defined in ANSI-C and is not part of C++, but is supported by some compilers.

And this function is c-style to.

I wrote my own c++-style function, and it works without problems:
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string convertInt(int number)
{
    if (number == 0)
        return "0";
    string temp="";
    string returnvalue="";
    while (number>0)
    {
        temp+=number%10+48;
        number/=10;
    }
    for (int i=0;i<temp.length();i++)
        returnvalue+=temp[temp.length()-i-1];
    return returnvalue;
}


Still, I would think there's a standard function (c++-style) available. If there isn't, can anyone give an example-code/link about how it's done stringstream?

Thanks for any help!
Bazzy (3164)   Link to this post
with stringstream:
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string convertInt(int number)
{
   stringstream ss;//create a stringstream
   ss << number;//add number to the stream
   return ss.str();//return a string with the contents of the stream
}
Last edited on
Oromis (73)   Link to this post
Thanks Bazzy!

I didnt know about the memberfunctions str(). I tried the construction that is used when converting string to integer, but that didnt work. This works great.
jsmith (3099)   Link to this post
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#include <boost/lexical_cast.hpp>

string s = boost::lexical_cast<string>( number );


Essentially does what Bazzy did, except this is 1 line of code (sometimes useful).

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