{"id":1665,"date":"2022-11-17T19:18:34","date_gmt":"2022-11-17T11:18:34","guid":{"rendered":"https:\/\/courtship.top\/?p=1665"},"modified":"2022-11-17T19:18:34","modified_gmt":"2022-11-17T11:18:34","slug":"%e6%96%87%e4%bb%b6%e8%af%bb%e5%86%99","status":"publish","type":"post","link":"https:\/\/courtship.top\/index.php\/2022\/11\/17\/%e6%96%87%e4%bb%b6%e8%af%bb%e5%86%99\/","title":{"rendered":"\u6587\u4ef6\u8bfb\u5199"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u5934\u6587\u4ef6<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ofstream \/\/\u6587\u4ef6\u5199\u64cd\u4f5c \u5185\u5b58\u5199\u5165\u5b58\u50a8\u8bbe\u5907<\/li>\n\n\n\n<li>ifstream \/\/\u6587\u4ef6\u8bfb\u64cd\u4f5c\uff0c\u5b58\u50a8\u8bbe\u5907\u8bfb\u533a\u5230\u5185\u5b58\u4e2d<\/li>\n\n\n\n<li>fstream \/\/\u8bfb\u5199\u64cd\u4f5c\uff0c\u5bf9\u6253\u5f00\u7684\u6587\u4ef6\u53ef\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u6253\u5f00\u6587\u4ef6<\/h2>\n\n\n\n<p>\u6210\u5458\u51fd\u6570open()\u5b9e\u73b0\u6253\u5f00\u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u4ece\u800c\u5c06\u6570\u636e\u6d41\u548c\u6587\u4ef6\u8fdb\u884c\u5173\u8054\uff0c\u901a\u8fc7<code>ofstream,ifstream,fstream<\/code>\u5bf9\u8c61\u8fdb\u884c\u5bf9\u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c<\/p>\n\n\n\n<p>\u5982\u679c\u8c03\u7528open\u51fd\u6570\u65f6\u7701\u7565mode\u6a21\u5f0f\u53c2\u6570\uff0c\u5219\u9ed8\u8ba4\u6309\u7167\u53ef\u8bfb\u53ef\u5199<code>(ios_base:in | ios_base::out)<\/code>\u7684\u65b9\u5f0f\u6253\u5f00<\/p>\n\n\n\n<p><code>voidopen( const char * filename,ios_base::openmode mode = ios_base::in | ios_base::out );<\/code><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>ios::in<\/td><td>\u4e3a\u8f93\u5165(\u8bfb)\u800c\u6253\u5f00\u6587\u4ef6<\/td><\/tr><tr><td>ios::out<\/td><td>\u4e3a\u8f93\u51fa(\u5199)\u800c\u6253\u5f00\u6587\u4ef6<\/td><\/tr><tr><td>ios::ate<\/td><td>\u521d\u59cb\u4f4d\u7f6e\uff1a\u6587\u4ef6\u5c3e<\/td><\/tr><tr><td>ios::app<\/td><td>\u6240\u6709\u8f93\u51fa\u9644\u52a0\u5728\u6587\u4ef6\u672b\u5c3e<\/td><\/tr><tr><td>ios::trunc<\/td><td>\u5982\u679c\u6587\u4ef6\u5df2\u5b58\u5728\u5219\u5148\u5220\u9664\u8be5\u6587\u4ef6<\/td><\/tr><tr><td>ios::binary<\/td><td>\u4e8c\u8fdb\u5236\u65b9\u5f0f<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">\u6253\u5f00\u6587\u4ef6\u6a21\u5f0f<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5224\u65ad\u6587\u4ef6\u662f\u5426\u6253\u5f00\u6210\u529f\uff1ais_open<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>is_open\u51fd\u6570\u662f\u7528\u6765\u5224\u65ad\u8c03\u7528open\u540e\u6587\u4ef6\u662f\u5426\u6253\u5f00\u6210\u529f\u7684\uff0c\u4e0d\u9700\u8981\u4f20\u9012\u53c2\u6570\uff1b<\/li>\n\n\n\n<li>is_open\u51fd\u6570\u7684\u8fd4\u56de\u503c\u662fbool\u7c7b\u578b\uff0c\u5982\u679c\u6587\u4ef6\u6253\u5f00\u6210\u529f\u5219\u8fd4\u56detrue\uff0c\u6253\u5f00\u5931\u8d25\u5219\u8fd4\u56deflase\uff1b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u9519\u8bef\u5224\u65ad\u65b9\u6cd5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>good()\u00a0\u00a0\u00a0\u5982\u679c\u6587\u4ef6\u6253\u5f00\u6210\u529f<\/li>\n\n\n\n<li>bad()\u00a0\u00a0\u00a0  \u6253\u5f00\u6587\u4ef6\u65f6\u53d1\u751f\u9519\u8bef<\/li>\n\n\n\n<li>eof()\u00a0\u00a0\u00a0\u00a0  \u5230\u8fbe\u6587\u4ef6\u5c3e<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bfb\u53d6\u5185\u5bb9<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u524d\u60c5\u63d0\u8981\uff08\u9700\u8981\u7684\u53d8\u91cf\uff09\nistream ifs(s);\nstring s;\nchar c;\nchar tmp&#91;1024];<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9010\u8bcd\u8bfb\u53d6<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u7b2c\u4e00\u79cd:\nstring tmp;\nwhile (ifs >> tmp)\n{\ncout &lt;&lt; tmp &lt;&lt; endl;\n}\n\/\/\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u4eceifs\u4e2d\u9010\u4e2a\u5355\u8bcd\u8bfb\u53d6\uff08\u4e5f\u5c31\u662f\u9047\u5230\u7a7a\u683c\u3001\u6362\u884c\u65f6\u4f1a\u505c\u6b62\uff09<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9010\u884c\u8bfb\u53d6<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7b2c\u4e8c\u79cd\uff1agetline()\nwhile (getline(ifs, s))\t\/\/1024\u662f\u5355\u6b21\u8bfb\u53d6\u7684\u6700\u5927\u5b57\u7b26\u6570\u91cf\n{\n    cout &lt;&lt; s &lt;&lt; endl;\n}\n\/\/ \u53ef\u4ee5\u548csstream\u7ed3\u5408\u4f7f\u7528\n\n\/\/ \u6216\u8005\uff1a\nwhile (ifs.getline(tmp, 1024))\t\/\/\u6ce8\u610f\u4e0a\u9762\u7684\u53ef\u4ee5\u5bf9string\u4f7f\u7528, \u800c\u8fd9\u4e2a\u662fchar*\n{\n    cout &lt;&lt; tmp &lt;&lt; endl;\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9010\u5b57\u7b26\u8bfb\u53d6<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u7b2c\u4e09\u79cd\uff1aget()\nwhile( (c = ifs.get()) \uff01= EOF)\n{\n    cout &lt;&lt; c; \/\/\u4e00\u4e2a\u5b57\u7b26\u4e00\u4e2a\u5b57\u7b26\u8f93\u51fa\n}\n\/\/\u4e0d\u63a8\u8350\uff0c\u6548\u7387\u4f4e<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5934\u6587\u4ef6 \u6253\u5f00\u6587\u4ef6 \u6210\u5458\u51fd\u6570open()\u5b9e\u73b0\u6253\u5f00\u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u4ece\u800c\u5c06\u6570\u636e\u6d41\u548c\u6587\u4ef6\u8fdb\u884c\u5173\u8054\uff0c\u901a\u8fc7ofstream,ifstream,fs &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-1665","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/comments?post=1665"}],"version-history":[{"count":0,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1665\/revisions"}],"wp:attachment":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/media?parent=1665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/categories?post=1665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/tags?post=1665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}