Rubyã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã®ç›´æŽ¥å‚ç…§ã«ã¤ã„㦠- 雑è‰SEã®å‚™å¿˜éŒ²ä¼šç¤¾ã§è°è«–ã«ãªã‚Šã€æœªã ã«ç§ã®ä¸ã§æ±ºç€ãŒã¤ã„ã¦ã„ãªã„å•é¡Œã‚’å–り上ã’ã¦ã¿ã¾ã™ã€‚ Rubyã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã‚’直接å‚ç…§ã™ã‚‹ã“ã¨ã«ã¤ã„ã¦ã§ã™ã€‚ 例ãˆã°ã€ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã§ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã‚’è¨å®šã—ã¾ã™ã€‚ ãã—ã¦ã€ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ãƒ¡ã‚½ãƒƒãƒ‰ã§ãã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã‚’直接å‚ç…§ã—ã¦å‡¦ç†ã‚’ã—ã¦å€¤ã‚’è¿”å´ã™ã‚‹ã¨ã„ã†ã“ã¨ã‚’ã—ã¾ã™ã€‚ 良ã„例ã§ã¯ãªã„ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ãŒã€ã“ã‚“ãªæ„Ÿã˜ã®ã‚¤ãƒ¡ãƒ¼ã‚¸ã§ã™ã€‚ class PriceCalculation def initialize(price, tax) @price = price @tax = tax end def tax_included_price @price * (1 + @tax) end end å‰æã¨ã—ã¦ã€@priceã‚„@taxã¯ã“ã®ã‚¯ãƒ©ã‚¹å†…ã®ã¿ã§ä½¿ç”¨ã•ã‚Œã€å¤–部ã‹ã‚‰ã¯å‚ç…§ã•ã‚Œãªã„ã‚‚ã®ã¨ã—ã¾ã™ã€‚ ã“ã‚Œã«å¯¾ã—ã€åŒåƒšã®ãƒ‰ã‚¤ãƒ„人ãŒã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã‚’直接å‚ç…§ã™ã‚‹ã®ã¯è‰¯ããªã„ã‹ã‚‰ã€
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