タグを打ち忘れていたついでに、html版ドキュメントを追加しました。

[ring-lang-081/ring.git] / docs / build / html / _sources / demo.txt

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+.. index:: 
+       single: デモプログラム; はじめに
+
+==============
+デモプログラム
+==============
+
+デモプログラムを紹介します。
+
+* 対話型プログラミング言語シェル
+* メインメニュー
+
+.. index:: 
+       pair: 対話型プログラミング言語シェル; 対話型プログラミング言語シェル
+
+対話型プログラミング言語シェル
+==============================
+
+このプログラムでは対話型プログラミング環境を作成します。
+
+.. code-block:: ring
+
+       while true 
+               see nl + "code:> "
+               give cCode 
+               try
+                       eval(cCode) 
+               catch
+                       see cCatchError
+               done
+       end
+
+実行結果:
+
+.. code-block:: ring
+
+       code:> see "hello world"
+       hello world
+       code:> for x = 1 to 10 see x + nl next
+       1
+       2
+       3
+       4
+       5
+       6
+       7
+       8
+       9
+       10
+
+       code:> func test see "Hello from test" + nl
+
+       code:> test()
+       Hello from test
+
+       code:> bye
+
+.. index:: 
+       pair: デモプログラム; メインメニュー
+
+メインメニュー
+==============
+
+用例:
+
+.. code-block:: ring
+
+       # デモプログラム
+
+       while true
+
+               see "
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               " give nMenu see nl
+
+               # IF-BUT-ELSE-OK の代わりに Switch-ON-Other-OFF を使えます。
+
+               Switch nMenu
+               On 1 sayhello() 
+               On 2 Sum()
+               On 3 Stars()
+               On 4 
+                       see "Enter Number : " give x
+                       see "Output : " 
+
+                       Try     
+                               see Fact(number(x))
+                       Catch
+                               see "Error in parameters!" + nl
+                       Done
+
+               On "5" return 
+               Other see "bad option" + nl
+               Off
+
+       end
+
+       func sayhello
+               see "Enter your name ? " give fname
+               see "Hello " + fname + nl
+
+       func sum
+               see "number 1 : " give num1 see "number 2 : " give num2
+               see "Sum : " see 0 + num1 + num2
+
+       func stars
+               for x = 1 to 10
+                       see space(8)
+                       for y = 1 to x see "*" next see nl
+               next
+
+       func fact x if x = 0 return 1 else return x * fact(x-1) ok
+
+       func space x y = "" for t=1 to x y += " " next return y
+
+実行結果:
+
+.. code-block:: ring
+
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               1
+
+       Enter your name ? Mahmoud Fayed
+       Hello Mahmoud Fayed
+
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               2
+
+       number 1 : 3
+       number 2 : 4
+       Sum : 7
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               3
+
+               *
+               **
+               ***
+               ****
+               *****
+               ******
+               *******
+               ********
+               *********
+               **********
+
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               4
+
+       Enter Number : 5
+       Output : 120
+
+               Main Menu
+               ===========
+               [1] Say Hello
+               [2] Sum two numbers
+               [3] Stars
+               [4] Fact
+               [5] Exit
+
+               5