argius https://blog.hatena.ne.jp/argius/ argius note https://argius.hatenablog.jp/ Haskell あたりまえですが、思ったとおりの結果が出力されます。 main = p 2 `and_then` p 3 >> twice (p 6) p :: (Show a) => a -> IO () p n = print n and_then :: IO () -> IO () -> IO () and_then a b = a >> b twice :: IO () -> IO () twice a = a >> a 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fargius.hatenablog.jp%2Fentry%2F20080213%2F1202914261" title="IOをつなげる練習 - argius note" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-02-13 23:51:01 rich https://argius.hatenablog.jp/entry/20080213/1202914261 1.0 100%