CSV-storing different parts(with a twist) part2

[koopey]

I have thought of using if statements but that would be long. any other ideas or maybe some string methods that I don't know about.

the question is(kind of):

in given string input, search for non-letter and non-number character like(',','@') and prompt user to choose between them as the separator to store different parts of string. eg;

For example, if you see input like this:
Alex Allain, [e-mail]
John Smith, [e-mail]
You should prompt the user to choose between comma, at sign, and period for the separator.

my present logic is like:

    string string_input;
    cout<<"enter a line: ";
    getline(cin,string_input,'\n');
    cout<<"the non-letter and non-number characters used are: ";
    for(int i=0;i<string_input.length();i++)
    {
        if(string_input[i]!='a'&&string_input[i]!='b')....(upto z)&&string_input[i]!='0'...(continued)...string_input[i]!='9')
        {
            cout<<string_input[i];
        }
    }

[keskiverto]

The standard library is your friend.
See http://www.cplusplus.com/reference/cctype/

[koopey]

oh thanks. 'isalnum' solved the problem.