{"id":3988,"date":"2012-05-02T10:42:24","date_gmt":"2012-05-02T09:42:24","guid":{"rendered":"http:\/\/www.iprog.it\/blog\/?p=3988"},"modified":"2013-06-07T11:03:55","modified_gmt":"2013-06-07T10:03:55","slug":"c-costrutti-di-selezione-if-e-else","status":"publish","type":"post","link":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/","title":{"rendered":"C++ Costrutti di selezione if e else"},"content":{"rendered":"

\"\"<\/a><\/p>\n

L’istruzione if \u00a0e Else<\/strong><\/p>\n

Questa istruzione ci permette di poter eseguire un istruzione oppure no in base alla sua condizione cio\u00e8 se \u00e8 veritiera o no, un esempio in lingua “umana “potrebbe essere<\/p>\n

se (if) oggi ci sar\u00e0 il sole \u00a0:<\/p>\n

uscir\u00f2 con i miei amici<\/p>\n

altrimenti(else)<\/p>\n

rester\u00f2 a casa<\/p>\n

un programma in c++ \u00a0con l’utilizzo dell if else potrebbe essere il seguente :<\/p>\n

[code lang=”obj-c”]
\nint main(int argc, char** argv) {<\/p>\n

int a;
\n cout<<\\”inserisci un numero\\n\\”;
\n cin>>a;
\n if(a>10){\/\/se a \u00e8 maggiore di 10
\n \/\/fai questo
\n cout<<\\”il numero che hai inserito e’ piu’ grande\\”;
\n }
\n else \/\/altrimenti
\n\/\/fai questo
\n cout<<\\”il numero che hai inserito e’ piu’ piccolo\\”;<\/p>\n

return 0;
\n}<\/p>\n

[\/code]<\/p>\n

Da notare che nell’istruzione if si utilizza un operatore relazionale (>)<\/p>\n

Tabella<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

L’istruzione if \u00a0e Else Questa istruzione ci permette di poter eseguire un istruzione oppure no in base alla sua condizione cio\u00e8 se \u00e8 veritiera o no, un esempio in lingua “umana “potrebbe essere se (if) oggi ci sar\u00e0 il sole \u00a0: uscir\u00f2 con i miei amici altrimenti(else) rester\u00f2 a casa… Read more »<\/a><\/p>\n","protected":false},"author":1,"featured_media":3972,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[2131,1608,1406,2132,2025,1606,1407],"class_list":["post-3988","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ansi-c-cpp","tag-condizionali","tag-condizione","tag-costrutti","tag-else","tag-if","tag-istruzione","tag-selezione"],"yoast_head":"\nC++ Costrutti di selezione if e else - iProg<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"C++ Costrutti di selezione if e else - iProg\" \/>\n<meta name=\"twitter:description\" content=\"L’istruzione if \u00a0e Else Questa istruzione ci permette di poter eseguire un istruzione oppure no in base alla sua condizione cio\u00e8 se \u00e8 veritiera o no, un esempio in lingua “umana “potrebbe essere se (if) oggi ci sar\u00e0 il sole \u00a0: uscir\u00f2 con i miei amici altrimenti(else) rester\u00f2 a casa... Read more »\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif\" \/>\n<meta name=\"twitter:creator\" content=\"@flexkid1\" \/>\n<meta name=\"twitter:site\" content=\"@iprogblog\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Diego\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/\"},\"author\":{\"name\":\"Diego\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/#\\\/schema\\\/person\\\/048c8acb70f8a33f1498675ab9db41a3\"},\"headline\":\"C++ Costrutti di selezione if e else\",\"datePublished\":\"2012-05-02T09:42:24+00:00\",\"dateModified\":\"2013-06-07T10:03:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/\"},\"wordCount\":143,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/wp-content\\\/uploads\\\/2012\\\/05\\\/3006_C___Language_Tutorial.gif\",\"keywords\":[\"condizionali\",\"condizione\",\"Costrutti\",\"else\",\"if\",\"istruzione\",\"selezione\"],\"articleSection\":[\"Ansi C - C++\"],\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/\",\"url\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/\",\"name\":\"C++ Costrutti di selezione if e else - iProg\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/wp-content\\\/uploads\\\/2012\\\/05\\\/3006_C___Language_Tutorial.gif\",\"datePublished\":\"2012-05-02T09:42:24+00:00\",\"dateModified\":\"2013-06-07T10:03:55+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/#\\\/schema\\\/person\\\/048c8acb70f8a33f1498675ab9db41a3\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/ansi-c-cpp\\\/c-costrutti-di-selezione-if-e-else\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/wp-content\\\/uploads\\\/2012\\\/05\\\/3006_C___Language_Tutorial.gif\",\"contentUrl\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/wp-content\\\/uploads\\\/2012\\\/05\\\/3006_C___Language_Tutorial.gif\",\"width\":367,\"height\":264},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/\",\"name\":\"iProg\",\"description\":\"perch\u00e9 reinventare la ruota?\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"it-IT\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/#\\\/schema\\\/person\\\/048c8acb70f8a33f1498675ab9db41a3\",\"name\":\"Diego\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g\",\"caption\":\"Diego\"},\"description\":\"Google+\",\"sameAs\":[\"http:\\\/\\\/it.linkedin.com\\\/in\\\/diegocaridei\\\/\",\"https:\\\/\\\/x.com\\\/flexkid1\",\"http:\\\/\\\/www.youtube.com\\\/channel\\\/UCjQ2z1ygV9tv55QAc2q3JHA\"],\"url\":\"https:\\\/\\\/www.iprog.it\\\/blog\\\/author\\\/flexkid\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C++ Costrutti di selezione if e else - iProg","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/","twitter_card":"summary_large_image","twitter_title":"C++ Costrutti di selezione if e else - iProg","twitter_description":"L’istruzione if \u00a0e Else Questa istruzione ci permette di poter eseguire un istruzione oppure no in base alla sua condizione cio\u00e8 se \u00e8 veritiera o no, un esempio in lingua “umana “potrebbe essere se (if) oggi ci sar\u00e0 il sole \u00a0: uscir\u00f2 con i miei amici altrimenti(else) rester\u00f2 a casa... Read more »","twitter_image":"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif","twitter_creator":"@flexkid1","twitter_site":"@iprogblog","twitter_misc":{"Scritto da":"Diego","Tempo di lettura stimato":"1 minuto"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#article","isPartOf":{"@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/"},"author":{"name":"Diego","@id":"https:\/\/www.iprog.it\/blog\/#\/schema\/person\/048c8acb70f8a33f1498675ab9db41a3"},"headline":"C++ Costrutti di selezione if e else","datePublished":"2012-05-02T09:42:24+00:00","dateModified":"2013-06-07T10:03:55+00:00","mainEntityOfPage":{"@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/"},"wordCount":143,"commentCount":0,"image":{"@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#primaryimage"},"thumbnailUrl":"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif","keywords":["condizionali","condizione","Costrutti","else","if","istruzione","selezione"],"articleSection":["Ansi C - C++"],"inLanguage":"it-IT","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/","url":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/","name":"C++ Costrutti di selezione if e else - iProg","isPartOf":{"@id":"https:\/\/www.iprog.it\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#primaryimage"},"image":{"@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#primaryimage"},"thumbnailUrl":"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif","datePublished":"2012-05-02T09:42:24+00:00","dateModified":"2013-06-07T10:03:55+00:00","author":{"@id":"https:\/\/www.iprog.it\/blog\/#\/schema\/person\/048c8acb70f8a33f1498675ab9db41a3"},"inLanguage":"it-IT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/"]}]},{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/www.iprog.it\/blog\/ansi-c-cpp\/c-costrutti-di-selezione-if-e-else\/#primaryimage","url":"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif","contentUrl":"https:\/\/www.iprog.it\/blog\/wp-content\/uploads\/2012\/05\/3006_C___Language_Tutorial.gif","width":367,"height":264},{"@type":"WebSite","@id":"https:\/\/www.iprog.it\/blog\/#website","url":"https:\/\/www.iprog.it\/blog\/","name":"iProg","description":"perch\u00e9 reinventare la ruota?","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.iprog.it\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"it-IT"},{"@type":"Person","@id":"https:\/\/www.iprog.it\/blog\/#\/schema\/person\/048c8acb70f8a33f1498675ab9db41a3","name":"Diego","image":{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/secure.gravatar.com\/avatar\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/bf8084effa4627f8e50af0d50d06b0677e4a9de5e895e347c0590ad5696fdfc9?s=96&r=g","caption":"Diego"},"description":"Google+","sameAs":["http:\/\/it.linkedin.com\/in\/diegocaridei\/","https:\/\/x.com\/flexkid1","http:\/\/www.youtube.com\/channel\/UCjQ2z1ygV9tv55QAc2q3JHA"],"url":"https:\/\/www.iprog.it\/blog\/author\/flexkid\/"}]}},"views":6086,"_links":{"self":[{"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/posts\/3988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/comments?post=3988"}],"version-history":[{"count":0,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/posts\/3988\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/media\/3972"}],"wp:attachment":[{"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/media?parent=3988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/categories?post=3988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iprog.it\/blog\/wp-json\/wp\/v2\/tags?post=3988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}