Ruby Examples

level7/61.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+Person 클래스 정의 (이름, 나이)
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+end
+
+charlie = Person.new("Charlie", 13)
+p charlie
+puts charlie.name

level7/62.rb

@@ -0,0 +1,22 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+인스턴스 메서드 작성
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+  def hello
+    puts "Hello, I'm #{name}!"
+  end
+end
+
+charlie = Person.new("Charlie", 13)
+puts charlie.hello

level7/63.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+생성자(initialize) 사용
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+end
+
+charlie = Person.new("Charlie", 13)
+puts charlie.hello

level7/64.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+접근자(attr_accessor) 사용
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+end
+
+charlie = Person.new("Charlie", 13)
+puts charlie.hello

level7/65.rb

@@ -0,0 +1,23 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+나이 증가 메서드
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+  def grow_up
+    @age += 1
+  end
+end
+
+charlie = Person.new("Charlie", 13)
+charlie.grow_up
+p charlie

level7/66.rb

@@ -0,0 +1,25 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+여러 Person 객체를 배열로 관리
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+  def grow_up
+    @age += 1
+  end
+end
+
+people = [
+  Person.new("Charlie", 13),
+  Person.new("Steve", 48),
+  Person.new("Anne", 34)
+]

level7/67.rb

@@ -0,0 +1,24 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+클래스 메서드 작성
+=end
+
+class Person
+  attr_accessor :name, :age
+
+  def initialize(name, age)
+    @name = name
+    @age = age
+  end
+
+  def self.species
+    "Homo Sapiens"
+  end
+
+end
+
+puts Person.species
+charlie = Person.new("Charlie", 13)
+puts charlie.class.species

level7/68.rb

@@ -0,0 +1,24 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+간단한 BankAccount 클래스
+=end
+
+class BankAccount
+  def initialize(balance)
+    @balance = balance
+  end
+
+  def deposit(amount)
+    @balance += amount
+  end
+
+  def withdraw(amount)
+    @balance -= amount
+  end
+
+  def get_balance
+    @balance
+  end
+end

level7/69.rb

@@ -0,0 +1,24 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+간단한 BankAccount 클래스
+=end
+
+class BankAccount
+  def initialize(balance)
+    @balance = balance
+  end
+
+  def deposit(amount)
+    @balance += amount
+  end
+
+  def withdraw(amount)
+    @balance -= amount
+  end
+
+  def get_balance
+    @balance
+  end
+end

level7/70.rb

@@ -0,0 +1,35 @@
+#!/usr/bin/ruby
+# -*- coding: utf-8 -*-
+
+=begin
+잔액 부족 예외 처리
+=end
+
+class BankAccount
+  def initialize(balance)
+    @balance = balance
+  end
+
+  def deposit(amount)
+    @balance += amount
+  end
+
+  def withdraw(amount)
+    begin
+      raise StandardError if @balance < amount
+      @balance -= amount
+    rescue
+      puts "잔액이 부족합니다."
+      @balance
+    end
+
+  end
+
+  def get_balance
+    @balance
+  end
+end
+
+account = BankAccount.new(100)
+puts account.withdraw(99)
+puts account.withdraw(5)