{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftmurata.hatenadiary.org%2Fentry%2F20100129%2F1264737553\" title=\"SICP\u554f\u984c3.33 - tmurata\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"tmurata","provider_url":"https://hatena.blog","version":"1.0","title":"SICP\u554f\u984c3.33","blog_url":"https://tmurata.hatenadiary.org/","type":"rich","provider_name":"Hatena Blog","categories":["SICP"],"published":"2010-01-29 12:59:13","blog_title":"tmurata\u306e\u65e5\u8a18","image_url":null,"width":"100%","url":"https://tmurata.hatenadiary.org/entry/20100129/1264737553","height":"190","author_url":"https://blog.hatena.ne.jp/tmurata/","description":"\u57fa\u672c\u4e57\u7b97, \u52a0\u7b97, \u304a\u3088\u3073\u5b9a\u6570\u306e\u5236\u7d04\u3092\u4f7f\u3044\u3001\u5165\u529b\u3068\u3057\u3066\u4e09\u3064\u306e\u30b3\u30cd\u30af\u30bfa, b, c\u3092\u3068\u308a\u3001c\u306e\u5024\u304ca\u3068b\u306e\u5e73\u5747\u3067\u3042\u308b\u3088\u3046\u306a\u5236\u7d04\u3092\u9054\u6210\u3059\u308b\u624b\u7d9a\u304daverager\u3092\u5b9a\u7fa9\u3059\u308b\u3002 averager\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u8868\u3057\u305f\u95a2\u4fc2 c = 0.5 * (x + y)\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002 \u250c\u2500\u2500\u2500\u2500\u2510 a \u2500\u2524a1 \u2502x \u250c\u2500\u2500\u2500\u2500\u2510 \u2502 + s\u251c\u2500\u2524m1 \u2502 b \u2500\u2524a2 \u2502 \u2502 * p\u251c\u2500 c \u2514\u2500\u2500\u2500\u2500\u2518\u250c\u2524m2 \u2502 y\u2502\u2514\u2500\u2500\u2500\u2500\u2518 \u250c\u2500\u2500\u2510\u2502 \u25020.5 \u251c\u2518 \u2514\u2500\u2500\u2518\u3088\u3063\u3066averager\u306e\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3002 (define (averager a b c) (let ((x (make-conne\u2026"}