Random String Generator

For a verification Key I needed a random string, which I was implementing like this:
// iType:   0 -> all syblos allowed
//          1 -> alphanumeric
//          2 -> alpha
//          3 -> numeric
CString RandomString( int iLength, int iType )
{
    CString strReturn;
    CString strLocal;

    for( int i = 0 ; i < iLength ; ++i )
    {
        int iNumber;

        // Seed the random-number generator with TickCount so that
        // the numbers will be different every time we run.
        srand( (unsigned int)( (i+1)*iLength*GetTickCount() ) );

        switch( iType )
        {
            case 1:
                iNumber = rand()%122;
                if( 48 > iNumber )
                    iNumber += 48;
                if( ( 57 < iNumber ) &&
                    ( 65 > iNumber ) )
                    iNumber += 7;
                if( ( 90 < iNumber ) &&
                    ( 97 > iNumber ) )
                    iNumber += 6;
                strReturn += (char)iNumber;
                break;
            case 2:
                iNumber = rand()%122;
                if( 65 > iNumber )
                    iNumber = 65 + iNumber%56;
                if( ( 90 < iNumber ) &&
                    ( 97 > iNumber ) )
                    iNumber += 6;
                strReturn += (char)iNumber;
                break;
            case 3:
                strLocal.Format("%i", rand()%9 );
                strReturn += strLocal;
                break;
            default:
                strReturn += (char)rand();
                break;
        }
    }

    return strReturn;
}

Bugs and Improvements:

Please report all bugs and improvements to me, thanks and enjoy it.

Last updated: 12 June 1998




Comments

  • Thank you

    Posted by rm_pkt on 03/27/2006 05:57am

    Nice code. I really enjoyed it

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Whether you're just now developing your first mobile app, refining an existing one, or deploying multiple apps, the process for doing so can be complicated. Utilizing a Rapid Mobile Application Development (RMAD) platform can help you not only make that process easier, but also help the business reach its goals in a timely, cost-efficient manner. This eBook outlines seven key factors to consider as you choose the right RMAD platform to meet your needs, and includes a quick-reference checklist.

  • Salesforce has been recognized by Gartner as a leader in this report for three years in a row. This graphic was published by Gartner, Inc. as part of a larger research document and should be evaluated in the context of the entire document. The Gartner document is available upon request from Salesforce.com. Gartner does not endorse any vendor, product or service depicted in its research publications, and does not advise technology users to select only those vendors with the highest ratings. Gartner research …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date