yes, that was not necessary :(

I also thought same way ! :/

I also loved that eight'teen' and nine'teen' aged people are not teenagers anymore :)

Good news for all old people out there: just wait until you're over 33 to feel young again! For all inputs >33 you can let the class print that you're young ... since ages over 30 aren't even considered haha

The correct one

class Person{ public: int age=0; 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 = 0;
        cout <<"Age is not valid, setting age to 0.\n";
    }
    else
    {
    age = initialAge;    
    }
}

void Person::amIOld(){
    // Do some computations in here and print out the correct statement to the console 

    if(age<13){
        cout<<"You are young.\n";
    }
    else if(age >=13 && age < 18)
    {
        cout<<"You are a teenager.\n";
    }
    else if(age >=18)
    {
    cout<<"You are old.\n";    
    }
}

void Person::yearPasses(){
    // Increment the age of the person in here
    age = age+1;

}

me too :(

Lol, get a chill pill, I am also depressed way too much, ask for my banking details and you will get them.

Lol... I cant stop laughing :v

Lol... I cant stop laughing :v

f**k yeah, old and older is what im getting.

Old but wise.

Your more older now

lol

Thank you akshayiyengar. This helped me! I was on the same boat, and could not find the solution. Thanks again!

Thank you so much. Can't understand the reason why we have to use global though. def amIOld works fine even though it does not need global age. And can you give me the link where you found this answer to use global ?

Hey by declaring the initialAge argument as an instance variable within the constructor, it can be used by the other class methods instead of using the global keyword. Check out my solution:

class Person:
    def __init__(self,initialAge):
        # Add some more code to run some checks on initialAge
        self.age = 0
        self.initialAge = initialAge
        if initialAge < 0:
            print ('Age is not valid, setting age to 0.')
        else: 
            initialAge = self.age


    def amIOld(self):
        # Do some computations in here and print out the correct statement to the console
        if self.initialAge < 13:
            print ('You are young.')
        elif 13 <= self.initialAge < 18:
            print ('You are a teenager.')
        else:
            print ('You are old.')


    def yearPasses(self):
        # Increment the age of the person in here      
        self.initialAge += 1

In all of your class methods, such as amIOld and yearPasses, you need to use self.age to get the same variable as in your __init__. Your use of global means it's not referencing the variable initialized as part of the instance in your __init__ and will lead to bugs, even if it's passing these naive test cases. (In general, always always always stay away from global or else you will get bitten). To properly solve this, just change all instances of age to self.age and your answer will be pretty much identical to mine.

I just realized how you got confused, when I realized the tutorial is explained in Java. In Java, you can reference instance variables without using this or self as a shortcut. Python does not have this. Java is OO only, so they can get away with that, but Python is a procedural language with OO added on, so it supports global variables and more advanced scoping, so you always have to reference instance variables explicitly as self.age as just age will reference something completely differently, but only in Python, not Java.

You don't need to use global, please review my Python 2 and 3 solutions that have been in the Editorial for months.

Here is my solution to the problem without using globals. I had a friend help me through it since I didn't understand how classes worked in python:

class Person:
    def __init__(self,initialAge):
        self.age = 0
        if initialAge < 0:
            print("Age is not valid, setting age to 0.")
        else:
            self.age = initialAge

    def amIOld(self):
        if self.age < 13:
            print("You are young.")
        elif self.age >= 13 and self.age < 18:
            print("You are a teenager.")
        else:
            print("You are old.")

    def yearPasses(self):
        self.age += 1

I used

self.age

and it worked.

I didn't have to use global variables. Here is my solution:

class Person: def init(self,initialAge): # Add some more code to run some checks on initialAge if initialAge < 0: self.age = 0 print("Age is not valid, setting age to 0.") else: self.age = initialAge def amIOld(self): # Do some computations in here and print out the correct statement to the console if self.age <13: print("You are young.") elif 13<=self.age<18: print("You are a teenager.") else: print("You are old.")

def yearPasses(self):
    # Increment the age of the person in here   
    self.age +=1

Thank you....your comment helped....

Here is the (recommended version) without the global variable. Hope this helps

class Person:
    def __init__(self, initialAge):
        # Add some more code to run some checks on initialAge
        self.age = initialAge
        if initialAge < 0:
            print("Age is not valid, setting age to 0.")
        else:
            self.age = initialAge
    
    def amIOld(self):
        # Do some computations in here and print out the correct statement to the console
        if self.age < 13:
            print("You are young.")
        elif 13 <= self.age < 18:
            print("You are a teenager.")
        elif self.age >= 18:
            print("You are old.")

    def yearPasses(self):    
        # Increment the age of the person in here
        self.age += 1

There is no need of else statement in init section. If age is not valid just set self age to zero.

if initialAge < 0:
            self.age = 0
            print("Age is not valid, setting age to 0.")

OMG THANKYOU! I was going NUTS trying to find out why the maths was failing!

It didn't help me though.

Perfect I have been trying to work out how to do this too.

Thank you so much. This saved my head!!

Thanks akshayiyengar, it helps me a lot to clear my doubt

self.initialAge += 1 , i think instead of global age we can use this. It worked for me.

Thanks a lot akshayiyengar..your solution really helped.

Thanks !!

thx :)

You use self.variable so it can be used inside other methods of your class, otherwise is not going to be accessible to them. It also makes your attribute/variable avaible to be called by '.' notation. ex. instance.age

i did banged my head too for hours

but my code still error, whereas i've followed your advice

Same here but I come know the logic of using GLOBAL keyword by reading this article:- https://www.geeksforgeeks.org/global-local-variables-python/

The same is for Swift language.

static int count=0; Person::Person(int initialAge){ if(initialAge>0) age=initialAge; else { age=0; count++; if(count==1) cout<<"Age is not valid, setting age to 0."; else cout<<"\nAge is not valid, setting age to 0."; } } void Person::amIOld(){ count++; if(age<13&&count==1) cout<<"You are young."; else if(age<13&&count!=1) cout<<"\nYou are young."; else if(age>=13&&age<18&&count==0) cout<<"You are a teenager."; else if(age>=13&&age<18&&count!=0) cout<<"\nYou are a teenager."; else if(count==1) cout<<"You are old."; else cout<<"\nYou are old."; } void Person::yearPasses(){ age++; }

Same for cpp :(

Mine here, It runs very fine..

if(initialAge > 0){ age = initialAge; }
else{ age = 0; Console.WriteLine("Age is not valid, setting age to 0."); }

 }
 public void amIOld() {
    // Do some computations in here and print out the correct statement to the console 
     if(age<13){
         Console.WriteLine("You are young.");
     }   
     else if(age>=13&&age<18){
         Console.WriteLine("You are a teenager.");
     }       
     else{
         Console.WriteLine("You are old.");
     }
 }

 public void yearPasses() {
    // Increment the age of the person in here
     age += 1;

working for me now.

It does add an extra line, but it passes anyway. If it's failing there's another problem.

In what you pasted, there's no period after "teenager", maybe that's your issue?

I'm not regular C# user but, I think you have to use "write" instead of "writeLine" & use "\n" at last in case of incorrect age message and at first in function "amIOld()"

I doesn't need any change in Main. This is C# code. My code passed all test cases.

class Person
{
    public int age;
    public Person(int initialAge)
    {
        // Add some more code to run some checks on initialAge
        if (initialAge >= 0)
        {
            age = initialAge;
        }
        else
        {
            Console.WriteLine("Age is not valid, setting age to 0.");
            age = 0;
        }
    }
    public void amIOld()
    {
        // Do some computations in here and print out the correct statement to the console
        if (age < 13)
            Console.WriteLine("You are young.");
        else if (age >= 13 && age < 18)
            Console.WriteLine("You are a teenager.");
        else
            Console.WriteLine("You are old.");
    }

    public void yearPasses()
    {
        // Increment the age of the person in here
        age += 1;
    }
}

I confirm. I also have the same problem in C#.

I am having the same problem with the java 7 version.

Same in PHP

C# is not broken, your code is.

I've added a solution for it to the Editorial. If you are failing this challenge, it's because of an error in the code you wrote (typically a spelling error in your output, like how the statements you pasted above are missing a period after teenager). The whitespace at the end of the output needs to be there to space each print statement and is trimmed before being compared with the test case.

C# worked perfectly fine on my end for this one. :)

It works buddy,just checck if you have not missed anything most probably '.'

Me too. Javascript.

Try it.

class Person { public int age;
public Person(int initialAge) { // Add some more code to run some checks on initialAge if(initialAge<=0) { age=0; Console.WriteLine("Age is not valid, setting age to 0.");
} else { age=initialAge; } } public void amIOld() { // Do some computations in here and print out the correct statement to the console if(age<13) { Console.WriteLine("You are young."); } else if(age>=13 && age<18) { Console.WriteLine("You are a teenager."); } else { Console.WriteLine("You are old."); } }

 public void yearPasses() {
    // Increment the age of the person in here
     age++;
 }

class Person { public int age;
public Person(int initialAge) { // Add some more code to run some checks on initialAge if(initialAge<=0) { age=0; Console.WriteLine("Age is not valid, setting age to 0.");
} else { age=initialAge; } } public void amIOld() { // Do some computations in here and print out the correct statement to the console if(age<13) { Console.WriteLine("You are young."); } else if(age>=13 && age<18) { Console.WriteLine("You are a teenager."); } else { Console.WriteLine("You are old."); } }

 public void yearPasses() {
    // Increment the age of the person in here
     age++;
 }

This worked for me Just fine with c#

class Person {
    public int age;
        public Person(int initialAge)
        {
            // Add some more code to run some checks on initialAge
            if (initialAge >0)
            {
                age = initialAge;
            }
            else
            {
                age = 0;
                Console.WriteLine("Age is not valid, setting age to 0.");
            }
        }
        public void amIOld()
        {
            // Do some computations in here and print out the correct statement to the console 
            if (age < 13)
            {
                Console.WriteLine("You are young.");
            }
            else if (age >=13 && age < 18)
            {
                Console.WriteLine("You are a teenager.");
            }
            else
            {
                Console.WriteLine("You are old.");
            }
        }

        public void yearPasses()
        {
            // Increment the age of the person in here
            age++;
        }

static void Main(String[] args) { int T=int.Parse(Console.In.ReadLine()); for (int i = 0; i < T; i++) { int age=int.Parse(Console.In.ReadLine()); Person p=new Person(age); p.amIOld(); for (int j = 0; j < 3; j++) { p.yearPasses(); } p.amIOld(); Console.WriteLine(); } } }

This should have been fixed by now...

I got the same issue for C++. I dont know if this can be fixed though...

Same issue with java also. I am scratchig from past one hour.

Person(int initialAge) {
		if (initialAge % 2 == 0) {
			age = initialAge;
System.out.println(age);
		} else {
			setAge(0);
			System.out.println("Age is not valid, setting age to 0");
		}
	}

	public void yearPasses() {
		age=age+1;
	}

	public void amIOld() {
		String result;
		if (age < 13) {
			result = "You are young.";
		}else {
		result = (age >= 13 && age < 18) ? "You are a teenager.":"You are old.";
		}
		System.out.println(result);
	}

An old one though ¯\_(ツ)_/¯

That got me too. I was making it output "You are a teenager" when age was less than 20 >__>