In this HackerRank Inheritance Code problem in c++ we need to complete the code so that when an exception is thrown and it prints Too short: n ( where n is the length of the given username).

HackerRank Inherited Code in C++ problem solution

HackerRank Inherited Code in C++ problem solution

#include <iostream>
#include <string>
#include <sstream>
#include <exception>
using namespace std;

/* BEGIN: unlocked */
  // Sample solution:
    class BadLengthException: public exception {
      private:
        char *msg;

      public:
        BadLengthException(int len) {
            msg = new char[2];
            msg[0] = len+'0'; // len < 5
            msg[1] = '\0';
        }

        virtual const char* what() const throw() {
            return msg;
        }
    };
/* END: unlocked */

bool checkUsername(string username) {
    bool isValid = true;
    int n = username.length();
    if(n < 5) {
        throw BadLengthException(n);
    }
    for(int i = 0; i < n-1; i++) {
        if(username[i] == 'w' && username[i+1] == 'w') {
            isValid = false;
        }
    }
    return isValid;
}

int main() {
    int T; cin >> T;
    while(T--) {
        string username;
        cin >> username;
        try {
            bool isValid = checkUsername(username);
            if(isValid) {
                cout << "Valid" << '\n';
            } else {
                cout << "Invalid" << '\n';
            }
        } catch (BadLengthException e) {
            cout << "Too short: " << e.what() << '\n';
        }
    }
    return 0;
}