{"id":748,"date":"2019-10-12T17:02:11","date_gmt":"2019-10-12T09:02:11","guid":{"rendered":"http:\/\/fankasy.xyz\/?p=748"},"modified":"2019-10-12T17:02:11","modified_gmt":"2019-10-12T09:02:11","slug":"%e6%88%91%e5%af%b9c%e4%b8%adstringstream%e7%9a%84%e4%b8%80%e4%ba%9b%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/fankasy.xyz\/index.php\/2019\/10\/12\/%e6%88%91%e5%af%b9c%e4%b8%adstringstream%e7%9a%84%e4%b8%80%e4%ba%9b%e7%90%86%e8%a7%a3\/","title":{"rendered":"\u6211\u5bf9C++\u4e2dstringstream\u7684\u4e00\u4e9b\u7406\u89e3"},"content":{"rendered":"\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u5f88\u591a\u4ecb\u7ecd\u662f\u8fd9\u4e48\u5199\u7684<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u5728\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\uff0c\u6570\u636e\u8f93\u5165\/\u8f93\u51fa\uff08I\/O\uff09\u64cd\u4f5c\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\uff0cC++ \u8bed\u8a00\u7684\u6570\u636e\u8f93\u5165\/\u8f93\u51fa\u64cd\u4f5c\u662f\u901a\u8fc7I\/O\u6d41\u5e93\u6765\u5b9e\u73b0\u7684\u3002C++\u4e2d\u628a\u6570\u636e\u4e4b\u95f4\u7684\u4f20\u8f93\u64cd\u4f5c\u79f0\u4e3a\u6d41\uff0c\u6d41\u65e2\u53ef\u4ee5\u8868\u793a\u6570\u636e\u4ece\u5185\u5b58\u4f20\u9001\u5230\u67d0\u4e2a\u8f7d\u4f53\u6216\u8bbe\u5907\u4e2d\uff0c\u5373\u8f93\u51fa\u6d41\uff0c\u4e5f\u53ef\u4ee5\u8868\u793a\u6570\u636e\u4ece\u67d0\u4e2a\u8f7d\u4f53\u6216\u8bbe\u5907\u4f20\u9001\u5230\u5185\u5b58\u7f13\u51b2\u533a\u53d8\u91cf\u4e2d\uff0c\u5373\u8f93\u5165\u6d41\u3002<\/p><\/blockquote>\n\n\n\n<p>\u6211\u89c9\u5f97\uff0c\u5982\u679c\u7ecf\u5e38\u5199\u6d89\u53ca\u8f93\u5165\u8f93\u51fa\uff0c\u6bd4\u5982\u6587\u4ef6\u64cd\u4f5c\uff0c\u5b57\u7b26\u4e32\u548c\u6570\u636e\u8bfb\u53d6\uff0c\u90a3\u4e48\u7406\u89e3\u201c\u6d41\u201d\u7684\u6982\u5ff5\u662f\u81ea\u7136\u800c\u7136\u7684\u3002C\u8bed\u8a00\u4e2d\u5bf9\u6d41\u7684\u64cd\u4f5c\u4f3c\u4e4e\u5e76\u4e0d\u65b9\u4fbf\u3002<br>\nC++\u4e2d\u5206\u4e3a4\u79cd\uff0c\u8f93\u5165 \u8f93\u51fa \u6587\u4ef6 (\u5b57\u7b26)\u4e32\u6d41<br>\n\u6211\u611f\u89c9\u6700\u6709\u5229\u4e8e\u5de5\u7a0b\u5904\u7406\u7684\uff0c\u5c31\u662f\u63d0\u4f9b\u4e86\u4e00\u4e2a\u597d\u7528\u7684\u4e34\u65f6\u5904\u7406\u533a\u3002\u6bd4\u5982\u4ece\u952e\u76d8\u8f93\u5165\u540e\uff0c\u80fd\u591f\u4fdd\u5b58\u5230\u4e00\u4e2a\u5b57\u7b26\u4e32\u6d41\u4e2d\uff0c\u8fdb\u884c\u67d0\u4e9b\u64cd\u4f5c\u540e\u518d\u4ece\u5b57\u7b26\u4e32\u6d41\u4e2d\u5c06\u6570\u636e\u5bfc\u5165\u5230\u8be5\u53bb\u7684\u5730\u65b9\u3002\u8fd9\u6837\u7684\u8bbe\u8ba1\u80fd\u591f\u907f\u514d\u9700\u8981\u7528\u6237\u523b\u610f\u6309\u7167\u67d0\u4e9b\u7279\u5b9a\u7684\u8f93\u5165\u987a\u5e8f\u8f93\u5165\u3002<\/p>\n\n\n\n<p>\u4e3e\u4e2a\u6817\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;sstream>\n#include&lt;string>\nusing namespace std;\nint main()\n{\n    int a = 42;\n    double b = 234562879527;\n    string integer;\n\n    ostringstream JKL;\n    JKL &lt;&lt; a &lt;&lt; \" : \" &lt;&lt; b;\n\n    integer = JKL.str();\n    cout &lt;&lt; integer &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u662f\u4e0d\u662f\u5f88\u65b9\u4fbf\uff01\u8c03\u7528ostringstream::str()\u51fd\u6570\uff0c\u628a\u4fdd\u5b58\u5728\u4e32\u6d41\u4e2d\u7684\u6570\u5b57\u8f6c\u6210\u5b57\u7b26\u4e32\u8f93\u51fa\u4e86\u3002\u6d41\u5728\u8fd9\u91cc\u5c31\u8d77\u5230\u4e86\u4e00\u4e2a\u7c7b\u4f3c\u6848\u677f\u7684\u4f5c\u7528\u3002<\/p>\n\n\n\n<p>\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u60f3\u8981\u6e05\u7a7a\u6d41\u4e2d\u7684\u6570\u636e\uff0cstringstream::clear()\u7684\u4f5c\u7528\u662f\u628a\u6848\u677f\u7a7a\u7740\u7684\u5730\u65b9\u632a\u5230\u8ddf\u524d\uff0c\u5b9e\u9645\u4e0a\u6ca1\u6709\u91ca\u653e\u5360\u7528\u7684\u5185\u5b58\uff08\u5b83\u5e76\u4e0d\u6e05\u7a7a\u4efb\u4f55\u5185\u5bb9\uff0c\u5b83\u53ea\u662f\u91cd\u7f6e\u4e86\u6d41\u7684\u72b6\u6001\u6807\u5fd7\u800c\u5df2\uff09\uff1b\u800c\u5728stringstream::str()\u51fd\u6570\u91cc\u5199\u4e0a\u5f15\u53f7: str(&#8220;&#8221;) \u7684\u5f62\u5f0f\uff0c\u80fd\u5f3a\u5236\u5c06\u6d41\u8d4b\u503c\u4e3a\u7a7a\u3002<\/p>\n\n\n\n<p>\u4f46\u80fd\u8bf4stringstream::clear()\u6ca1\u7528\u5417\uff1f\u5176\u5b9e\u5b83\u7684\u4f5c\u7528\u662f\u91cd\u7f6e\u4e86\u72b6\u6001\u6807\u5fd7\uff0c\u8ba9\u8fd9\u4e2a\u6d41\u8868\u793a\u81ea\u5df1\u662f\u65b0\u7684\uff0c\u53ef\u4ee5\u5f80\u91cc\u585e\u5176\u4ed6\u7c7b\u578b\u7684\u6570\u636e\u3002\u8fd9\u65f6\u5019\uff0c\u7528str(&#8220;&#8221;)\u90fd\u4e0d\u80fd\u8d77\u4f5c\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;sstream>\n#include&lt;string>\nusing namespace std;\nint main()\n{\n    stringstream sstream;\n    int first, second;\n    \/\/\u628astring\u8f6c\u6210int\n    sstream &lt;&lt; \"456\";\n    sstream >> first;\n    cout &lt;&lt; first &lt;&lt; endl;\n    \/\/\u60a8\u53ef\u4ee5\u628a\u4e0b\u4e00\u884c\u6ce8\u91ca\u6389\u540e\u518d\u8bd5\u4e00\u6b21\n    sstream.clear();\n    sstream &lt;&lt; true;\n    sstream >> second;\n    cout &lt;&lt; second &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u66f4\u591a\u7684\u7528\u6cd5\u8fd8\u7b49\u5f85\u7740\u4eba\u6c11\u53bb\u53d1\u73b0\u548c\u521b\u9020\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f88\u591a\u4ecb\u7ecd\u662f\u8fd9\u4e48\u5199\u7684 \u5728\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\uff0c\u6570\u636e\u8f93\u5165\/\u8f93\u51fa\uff08I\/O\uff09\u64cd\u4f5c\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\uff0cC++ \u8bed\u8a00\u7684\u6570\u636e\u8f93\u5165\/\u8f93\u51fa\u64cd\u4f5c\u662f [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"_links":{"self":[{"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/posts\/748"}],"collection":[{"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=748"}],"version-history":[{"count":0,"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/posts\/748\/revisions"}],"wp:attachment":[{"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=748"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fankasy.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}