Help with C++.. Objective In this challenge, we\'re going to learn about the dif

Question

Help with C++..

Objective
In this challenge, we're going to learn about the difference between a class and an instance;
because this is an Object Oriented concept, it's only enabled in certain languages. Check out
the Tutorial tab for learning materials and an instructional video!
Task
Write a Person class with an instance variable, age, and a constructor that takes an integer, initialAge, as a
parameter. The constructor must assign initialAge to age after confirming the argument passed as initialAge is not
negative; if a negative argument is passed as initialAge, the constructor should set age to 0, and print Age is not
valid, setting age to 0. In addition, you must write the following instance methods:
1. yearPasses() should increase the instance variable by 1. .
2. amIOld() should perform the following conditional actions:
• If age <13 , print You are young..
• If age 13 and , age <18 print You are a teenager..
• Otherwise, print You are old..
To help you learn by example and complete this challenge, much of the code is provided for
you, but you'll be writing everything in the future. The code that creates each instance of
your Person class is in the main method. Don't worry if you don't understand it all quite yet!
Note: Do not remove or alter the stub code in the editor.
Input Format
Input is handled for you by the stub code in the editor.
The first line contains an integer,T (the number of test cases), and the T subsequent lines each
contain an integer denoting the age of a Person instance.

• Constraints
• 1 T 4
• -5 age 30
Output Format
Complete the method definitions provided in the editor so they meet the specifications outlined
above; the code to test your work is already in the editor. If your methods are implemented
correctly, each test case will print or lines (depending on whether or not a valid initial agewas
passed to the constructor).
Sample Input
4
-1
10
16
18
Sample Output
Age is not valid, setting age to 0.
You are young.
You are young.
You are young.
You are a teenager.

You are a teenager.
You are old.
You are old.
You are old.
Explanation
• Test Case 0: initial age = -1
Because initial Age < 0 our code must set Age to 0 and print the "Age is not valid..." message
followed by the young message. Three years pass and age=3, so we print the young message
again.
Test Case 1: initial Age= 10
Because initial Age< 13 , our code should print that the person is young. Three years pass and age=13 ,
so we print that the person is now a teenager.
Test Case 2: initial Age=16
Because 13 initial Age < 18 our code should print that the person is a teenager. Three years
pass and age=19, so we print that the person is old.
Test Case 3: initial Age=18
Because initial Age 18 , our code should print that the person is old. Three years pass and
the person is still old at age 21, so we print the old message again.
The extra line at the end of the output is supposed to be there and is trimmed before
being compared against the test case's expected output. If you're failing this challenge,
check your logic and review your print statements for spelling errors.

Explanation / Answer

#include <iostream>
#include <string>

using namespace std;
class Person
{
private:
int age;
public:
Person(int a)
{
if(a<0)
{
cout<<"Age is not valid, setting age to 0."<<endl;
age=0;
}
else
{
age=a;
}
}
void yearPasses(){
age=age+1;
}
void amIOld(){
if(age <13)
cout<<"You are young"<<endl;
else if(age<18)
cout<<"You are teenager"<<endl;
else
cout<<"You are old"<<endl;
}
};

int main() {
int number,i,age;
std::cout << "Hello World! ";
cout<<"Enter the number of test cases";
cin>>number;
for(i=0;i<number;i++)
{
cout<<"Enter the age of person";
cin>>age;
Person person(age);
person.yearPasses();
person.amIOld();
person.yearPasses();
person.amIOld();
person.yearPasses();
person.amIOld();
  
}
  
}

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