{"id":4399,"date":"2018-12-13T06:00:08","date_gmt":"2018-12-13T04:00:08","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=4399"},"modified":"2022-03-25T20:37:22","modified_gmt":"2022-03-25T18:37:22","slug":"expresiones-aritmeticas-generales","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/expresiones-aritmeticas-generales\/","title":{"rendered":"Expresiones aritm\u00e9ticas generales"},"content":{"rendered":"<p>Las expresiones aritm\u00e9ticas. generales se contruyen con las sumas generales (sumatorios) y productos generales (productorios). Su tipo es<\/p>\n<pre lang=\"text\">\n   data Expresion = N Int\n                  | S [Expresion]\n                  | P [Expresion]\n     deriving Show\n<\/pre>\n<p>Por ejemplo, la expresi\u00f3n (2 * (1 + 2 + 1) * (2 + 3)) + 1 se representa por S [P [N 2, S [N 1, N 2, N 1], S [N 2, N 3]], N 1]<\/p>\n<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\n   valor :: Expresion -> Int\n<\/pre>\n<p>tal que (valor e) es el valor de la expresi\u00f3n e. Por ejemplo,<\/p>\n<pre lang=\"text\">\n   \u03bb> valor (S [P [N 2, S [N 1, N 2, N 1], S [N 2, N 3]], N 1])\n   41\n<\/pre>\n<h4>Soluciones<\/h4>\n<pre lang=\"haskell\">\ndata Expresion = N Int\n               | S [Expresion]\n               | P [Expresion]\n  deriving Show\n\nvalor :: Expresion -> Int\nvalor (N x)  = x\nvalor (S es) = sum (map valor es)\nvalor (P es) = product (map valor es)\n<\/pre>\n<h4>Pensamiento<\/h4>\n<blockquote><p>\nVivir es devorar tiempo, esperar; y por muy trascendente que quiera ser nuestra espera, siempre ser\u00e1 espera de seguir esperando.<\/p>\n<p>Antonio Machado\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Las expresiones aritm\u00e9ticas. generales se contruyen con las sumas generales (sumatorios) y productos generales (productorios). Su tipo es data Expresion = N Int | S [Expresion] | P [Expresion] deriving Show Por ejemplo, la expresi\u00f3n (2 * (1 + 2 + 1) * (2 + 3)) + 1 se representa por S [P [N 2,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false},"categories":[5],"tags":[10,11,6,133],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4399"}],"collection":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/comments?post=4399"}],"version-history":[{"count":4,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4399\/revisions"}],"predecessor-version":[{"id":4576,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4399\/revisions\/4576"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=4399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=4399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=4399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}