#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main () {

    char message [] = "";

    char code [] = "";

    int splittedCode [] = {};

    int digit, digitNumber;


    // Get message

    printf ("Scrivi un messaggio.\n");

    scanf ("%s", message);


    //Get code

    printf ("Inserisci il codice segreto (massimo 6 numeri).\n");

    scanf ("%s", &code);


    //Check if code contains letters

    for (int i = 0; i < strlen (code); ++i) {

        digit = code [i];

        if (digit >= "0" && digit <= "9") {

            ++digitNumber;

        }

    }

    //If code contains letter or is more than 6 characters long

    while (digitNumber != strlen (code)) {

        printf ("Il codice non e' valido, inserisci un codice valido.\n");

        scanf ("%d", &code);

        for (int i = 0; i < strlen (code); ++i) {

            digit = code [i];

            if (digit >= "0" && digit <= "9") {

                digitNumber = 0;
                ++digitNumber;

            }

        }

    }

    return 0;

}