Lambda Function question?

[Bdanielz]

how would I if possible

Take this function

void stringIsAnum(string &x, string prompt) { while (!is_digits(x = getInput(prompt))); }

// calling this code 

string getInput(string prompt) {

    string x;

    cout << prompt << endl;
    cin >> x;
    return x;
}

to add the below as a Lambda to the first function?

cerr << "Digits only please"<< endl; 

[coder777]

See:

http://en.cppreference.com/w/cpp/language/lambda
http://www.cprogramming.com/c++11/c++11-lambda-closures.html
http://stackoverflow.com/questions/8109571/lambda-as-function-parameter

[sujitnag]

post your program with general/ normal function call. I show you Lambda conversion.