HR30 Day 4: Class vs. Instance

1 개요

Day 4: Class vs. Instance

• https://www.hackerrank.com/challenges/30-class-vs-instance/problem

해커랭크 30 Days of Code

문제	풀이
0-9 Day e
HR30 Day 0: Hello, World.
HR30 Day 1: Data Types
HR30 Day 2: Operators
HR30 Day 3: Intro to Conditional Statements
HR30 Day 4: Class vs. Instance
HR30 Day 5: Loops
HR30 Day 6: Let's Review
HR30 Day 7: Arrays
HR30 Day 8: Dictionaries and Maps
HR30 Day 9: Recursion

2 Java

HR30 Day 4: Class vs. Instance/Java 문서를 참고하십시오.

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++;
	}

3 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++;
    }
}

4 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