{"id":966,"date":"2015-11-17T17:46:30","date_gmt":"2015-11-17T17:46:30","guid":{"rendered":"http:\/\/coolt.ch\/notizen\/?p=966"},"modified":"2015-11-29T11:44:20","modified_gmt":"2015-11-29T11:44:20","slug":"c-stream","status":"publish","type":"post","link":"https:\/\/coolt.ch\/notizen\/c-stream\/","title":{"rendered":"C++: stream"},"content":{"rendered":"

– alle Daten werden zu chars
\n– In: <\/strong>bedeutet von aussen zur CPU.
\n– out: <\/strong>bedeutet von OS nach aussen
\n<\/strong>————————————————————————————-
\n
\nistream<\/strong>
\nchar Daten werden \u00fcbergeben<\/p>\n

ostream<\/strong>
\nsendet chars an eine Ort (file, konsole, speicher, ..)<\/p>\n

ifstream<\/strong>\u00a0 [Daten in File ablegen]
\n– Datei als String mitgeben
\n ifstream stream_a {„input.txt“}<\/span>
\n– Inhalt wortweise in String ablegen string temp<\/span>
\n– Strings in Vektor speichern\u00a0\u00a0 vector <string> input<\/span><\/p>\n

while (stream_a >> temp) {<\/strong>      \r\n        \/\/ fill vector\r\n        input.push_back(temp);<\/strong>\r\n    }<\/pre>\n

\nofstream<\/strong> [ lesen von einem file (wird als stream gemacht)]<\/p>\n
cout << \"Name of output file\"\r\nstring name_outputfile;\r\ncin >> name_outputfile;\r\n\r\nostream stream_1 {name_outputfile};\r\nif (! stream_1) error(\"Konnte nicht eingelesen werden.\");<\/pre>\n
 <\/p>\n
strukturiert einlesen<\/strong><\/p>\n
struct<\/strong> Inputdata {\r\n    int hour;\r\n    double temperature; \r\n};<\/pre>\n
cout << \"Please enter input file name: \";\r\n    string name_inputfile;\r\n    cin >> name_inputfile;\r\n    ifstream ist {name_inputfile}<\/strong>;\r\n    if (!ist) throw ios_base::failure(\"can't open input file \"+name_inputfile);<\/pre>\n
vector<Inputdata> temps<\/strong>; \/\/ structured vector\r\n    int hour;\r\n    double temperature;\r\n\r\n    \/\/ read structured in<\/strong>\r\n    while (ist >> hour >> temperature) {<\/strong>\r\n        if (hour < 0 || 23 <hour) throw range_error(\"hour out of range\");\r\n        \/\/ fill vector\r\n        temps.push_back(Inputdata{hour,temperature});<\/strong>\r\n    }<\/pre>\n
 <\/p>\n
strucktruriert ausgeben<\/strong><\/p>\n
\/\/ set brackets for clearer structure\r\n    for (int i=0; i<input.size(); ++i)\r\n        ost << '(' << input[i].hour << ','\r\n            << input[i].temperature << \")\\n\";<\/pre>\n
 <\/p>\n
 <\/p>\n
…<\/p>\n
 <\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
– alle Daten werden zu chars – In: bedeutet von aussen zur CPU. – out: bedeutet von OS nach aussen ————————————————————————————- istream char Daten werden \u00fcbergeben ostream sendet chars an eine Ort (file, konsole, speicher, ..) ifstream\u00a0 [Daten in File ablegen] – Datei als String mitgeben ifstream stream_a {„input.txt“} – Inhalt wortweise in String ablegen … C++: stream<\/span> weiterlesen<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[29],"tags":[34,32],"_links":{"self":[{"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/posts\/966"}],"collection":[{"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/comments?post=966"}],"version-history":[{"count":6,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/posts\/966\/revisions"}],"predecessor-version":[{"id":1009,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/posts\/966\/revisions\/1009"}],"wp:attachment":[{"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/media?parent=966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/categories?post=966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coolt.ch\/notizen\/wp-json\/wp\/v2\/tags?post=966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}