HR30 Day 4: Class vs. Instance 문서 원본 보기

==개요==
;<nowiki>Day 4: Class vs. Instance</nowiki>
* https://www.hackerrank.com/challenges/30-class-vs-instance/problem

{{HR30 헤더}}
{{HR30 0-9}}
|}

==Java==
{{참고|HR30 Day 4: Class vs. Instance/Java}}
<syntaxhighlight lang='java'>
public class Person {
	private int age;	
	public Person(int initialAge) {
		// Add some more code to run some checks on initialAge
		if( initialAge < 0 ) {
			System.out.println("Age is not valid, setting age to 0.");
			initialAge = 0;	
		}
		this.age = initialAge;
	}
	public void amIOld() {
		// Write code determining if this person's age is old and print the correct statement:
		if( this.age < 13 ) {
			System.out.println("You are young.");
			return;
		}
		if( this.age < 18 ) {
			System.out.println("You are a teenager.");
			return;
		}
		System.out.println("You are old.");
	}
	public void yearPasses() {
		// Increment this person's age.
		this.age++;
	}
</syntaxhighlight>

==PHP==
<syntaxhighlight lang='php'>
<?php
class Person{
    private $age;
    public function __construct($initialAge){
        if( $initialAge < 0 ) {
            echo "Age is not valid, setting age to 0.\n";
            $initialAge = 0;
        }
        $this->age = $initialAge;
    }
    public  function amIOld(){
        if( $this->age < 13 ) {
            echo "You are young.\n"; 
            return;
        } 
        if( 13 <= $this->age && $this->age < 18 ) {
            echo "You are a teenager.\n"; 
            return;
        } 
        echo "You are old.\n"; 
    }
    public  function yearPasses(){
        $this->age++;
    }
}
</syntaxhighlight>

==Python==
<syntaxhighlight lang='python'>
class Person:
    def __init__(self,initialAge):
        if initialAge < 0:
            print("Age is not valid, setting age to 0.")
            initialAge = 0
        self.age = initialAge
    def amIOld(self):
        if self.age < 13:
            print("You are young.")
            return
        if 13 <= self.age and self.age < 18:
            print("You are a teenager.")
            return
        print("You are old.")
    def yearPasses(self):
        self.age += 1
</syntaxhighlight>