Question

my string is “37829300”.

How can I space out every 2 characters in the string so the result can be “37 82 93 00”.

I am trying to achieve this in vc++.

Thanks.

I understand I may have to use #include iostream but I am lost on how to do it properly.

Answer 1

Couldn’t find a fancy one-liner regular-expression, so let’s do it the manual way.

private static string AddSpaceAfterTwoDigits(string input)
{
    string output = string.Empty;
    MatchCollection arr = Regex.Matches(input, @"\d\d");
    if ( arr.Count > 0 )
    {
        output = arr[0].Groups[0].Value; // Add the first with no space

        for ( int i = 1; i < arr.Count; i++ )
        {
            output += " " + arr[i].Groups[0].Value;
        }
    }

    return output;
}

• The code is in C#, but it’s a fairly straight-forward conversion to C++/CLI.
• The code assumes an input of an even number of digits.