hackerrankday4.cpp

#include <iostream>

using namespace std;

class Person {
public:
    int age;

    Person(int initialAge);

    void amIOld();

    void yearPasses();
};

Person::Person(int initialAge) 
{
    // Add some more code to run some checks on initialAge
    if (initialAge > 0) age = initialAge;
    else 
	{
        cout << "Age is not valid, setting age to 0." << endl;
        age = 0;
    }
}
void Person::amIOld() 
{
    // Do some computations in here and print out the correct statement to the console
    if (age < 13) cout << "You are young." << endl;
    else if (age < 18) cout << "You are a teenager." << endl;
    else cout << "You are old." << endl;
}
void Person::yearPasses() 
{
    // Increment the age of the person in here
    age++;
}
int main() 
{
    int t;
    int age;
    cin >> t;
    for (int i = 0; i < t; i++) 
	{
        cin >> age;
        Person p(age);
        p.amIOld();
        for (int j = 0; j < 3; j++) 
		{
            p.yearPasses();
        }
        p.amIOld();
        cout << '\n';
    }

    return 0;
}