{"id":726,"date":"2012-01-29T16:43:38","date_gmt":"2012-01-29T08:43:38","guid":{"rendered":"http:\/\/www.hawkwithwind.net\/blog\/?p=726"},"modified":"2012-01-29T17:21:26","modified_gmt":"2012-01-29T09:21:26","slug":"%e5%8f%88%e6%98%af%e5%91%bd%e5%90%8d%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.hawkwithwind.net\/blog\/2012\/01\/29\/%e5%8f%88%e6%98%af%e5%91%bd%e5%90%8d%e6%b3%95\/","title":{"rendered":"\u53c8\u662f\u547d\u540d\u6cd5"},"content":{"rendered":"<p>\u547d\u540d\u6cd5\u662f\u4e2a\u6211\u4e0d\u60f3\u518d\u7ea0\u7ed3\u7684\u4e1c\u897f\uff0c\u4e0d\u8fc7\u6700\u8fd1\u53c8\u9047\u4e0a\u4e86&#8230;<br \/>\n\u78b0\u5de7\u8fc7\u5b8c\u5e74\uff0c\u8111\u5b50\u9508\u6389\u4e86\uff0c\u5c45\u7136\u8bfb\u4e0d\u61c2\u81ea\u5df1\u5e74\u524d\u5199\u7684\u4ee3\u7801\u4e86\u3002\u6211\u5411\u6765\u5949\u884c\u201c\u4ee3\u7801\u5373\u6ce8\u91ca\u201d\u539f\u5219\uff0c\u4e5f\u5c31\u662f\u8bf4&#8230;\u51e0\u4e4e\u4e0d\u5199\u6ce8\u91ca&#8230;\u5b8c\u5168\u4f9d\u9760\u51fd\u6570\u548c\u53d8\u91cf\u547d\u540d\u7684\u542b\u4e49\u6765\u8868\u8fbe\u4ee3\u7801\u7684\u610f\u56fe\u548c\u601d\u8def\uff0c\u9664\u975e\u771f\u6709\u590d\u6742\u5230\u9700\u8981\u6ce8\u91ca\u7684\u5730\u65b9\uff0c\u4f8b\u5982\u83ab\u540d\u5176\u5999\u7684\u9700\u8981\u591a\u7ebf\u7a0b\u540c\u6b65\u7684\u5730\u65b9\u4e4b\u5916\uff0c\u5176\u4f59\u4e00\u5f8b\u4e0d\u5199\u6ce8\u91ca\u3002\u4e0d\u8fc7\u53cd\u4f5c\u7528\u5c31\u662f\uff0c\u5e74\u524d\u90a3\u9635\u5b50\u8d2a\u73a9\uff0c\u6ca1\u8ba4\u771f\u597d\u597d\u5199\u4ee3\u7801\uff0c\u5bfc\u81f4\u547d\u540d\u6709\u70b9\u7cdf\u7cd5\uff0c\u8fc7\u4e86\u5e74\u56de\u6765\u518d\u8bfb\u5c31\u6709\u70b9\u7ed5\u4eba\u4e86&#8230;<\/p>\n<p>\u4e00\u8fb9\u6539\u90a3\u4e9b\u53d8\u91cf\u7684\u540d\u5b57\uff0c\u4e00\u8fb9\u5c31\u9047\u5230\u8fd9\u4e2a\u547d\u540d\u6cd5\u7684\u95ee\u9898\u3002\u6211\u8fd8\u5728\u7528\u5308\u7259\u5229\u524d\u7f00\uff0c\u6574\u6570\u7528n\uff0c\u6d6e\u70b9\u6570\u7528f\uff0c\u5b57\u7b26\u4e32\u7528sz\u3002\u73b0\u5728\u9700\u8981\u81ea\u5df1\u589e\u52a0\u51e0\u4e2a\u81ea\u5df1\u7684\u89c4\u5219\u3002<br \/>\niterator\u7c7b\u578b\uff0c\u6211\u539f\u5148\u7528it\u505a\u524d\u7f00\uff0c\u6253\u51fa\u7684\u4ee3\u7801\u770b\u4e0a\u53bb\u975e\u5e38\u4e11\u964b\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"cpp\">\r\nfor(std::vector&lt;Phone&gt;::iterator itPhone = phoneList.begin(), \r\n    itPhoneEnd = phoneList.end(); itPhone != itPhoneEnd; ++itPhone) {\r\n  \/\/...\r\n}\r\n<\/code><\/pre>\n<p>\u5355\u7eaf\u5c31\u89c9\u5f97\u8fd9\u4e24\u4e2a\u5b57\u6bcd\u653e\u5728\u524d\u9762\u4e0d\u642d\uff0c\u4e0d\u7f8e&#8230;\u73b0\u5728\u6211\u7528\u5c0f\u5199t\u505a\u524d\u7f00\uff0c\u597d\u770b\u591a\u4e86\u3002<\/p>\n<pre><code class=\"cpp\">\r\nfor(std::vector&lt;Phone&gt;::iterator tPhone = phoneList.begin(),\r\n    tPhoneEnd = phoneList.end(); tPhone != tPhoneEnd; ++tPhone) {\r\n  \/\/...\r\n}\r\n<\/code><\/pre>\n<p>\u5f53\u7136\u4e86\uff0c\u8fd9\u662f\u53e4\u8463\u4ee3\u7801\u4e86\uff0c\u6709\u4e86foreach\uff0c\u8fd9\u6837\u7684\u4ee3\u7801\u5df2\u7ecf\u53ef\u4ee5\u8fdb\u5783\u573e\u5806\u4e86\u3002\u4e0d\u8fc7\u96be\u514d\u7528\u5230iterator\u7684\u65f6\u5019\u4ffa\u5c31\u8be5\u8bb0\u5f97\u7528\u8fd9\u4e2at\u524d\u7f00\u3002\u8fd8\u6709\u5c31\u662f\u9879\u76ee\u91cc\u7684\u4ee3\u7801\u6211\u4e0d\u60f3\u9730\u5f39\u67aa\u4e00\u8d77\u52a8\uff0c\u5148\u8fd9\u6837\u653e\u7740\u6bd4\u4e71\u6539\u5b89\u5168\u5f88\u591a&#8230;<\/p>\n<p>\u53d7\u8fd9\u4e2a\u542f\u53d1\uff0ctypedef\u51fa\u6765\u7684\u53d8\u91cf\u7c7b\u578b\u7528\u5927\u5199T\u524d\u7f00\uff0c\u4f8b\u5982<\/p>\n<pre><code class=\"cpp\">\r\ntypedef std::vector&lt;Phone&gt; TPhoneList; \r\nfor(TPhoneList::iterator tPhone = phoneList.begin(), \r\n    tPhoneEnd = phoneList.end(); tPhone != tPhoneEnd; ++tPhone) {\r\n  \/\/...\r\n}\r\n<\/code><\/pre>\n<p>\u6211\u559c\u6b22typedef\u51fa\u51e0\u4e2a\u9879\u76ee\u4e2d\u5e38\u7528\u7684\u5bb9\u5668\u7c7b\u578b\u3002\u4ec5\u4ec5\u5230\u5bb9\u5668\u7c7b\u578b\uff0c\u800citerator\u7c7b\u578b\u76f4\u63a5\u4f7f\u7528Type::iterator\u5f15\u7528\uff0c\u800c\u4e0d\u8fdb\u4e00\u6b65typedef\u3002\u8fd9\u6837\u6070\u597d\u4fdd\u6301\u4ee3\u7801\u7684\u7b80\u6d01\u7a0b\u5ea6\u9002\u4e2d\uff0c\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<p>std::string\u7c7b\u578b\u7528str\u524d\u7f00\uff0c\u800craw string\u7c7b\u578b(0\u7ed3\u5c3e\u7684\u5b57\u8282\u5e8f\u5217)\u7528sz\u7c7b\u578b\uff0c\u4ece\u800c\u533a\u5206\u4e24\u8005\u3002\u8fd9\u4e00\u70b9\u901a\u5e38\u4e0d\u91cd\u8981\uff0c\u4f46\u662f\u5f53\u4f60\u4f7f\u7528printf\u7684\u65f6\u5019:<\/p>\n<pre><code class=\"cpp\">\r\nstd::string strName = \"Peter Pan\";\r\nprintf(\"hello %s\\n\", strName.c_str());\r\n<\/code><\/pre>\n<p>str\u524d\u7f00\u4f1a\u63d0\u9192\u4f60\u8bb0\u5f97\u7528\u4e0ac_str()\u65b9\u6cd5\u3002\u4e8b\u5b9e\u4e0a\u8fd9\u4e2a\u95ee\u9898\u60f9\u607c\u6211\u597d\u51e0\u56de\u4e86\uff0c\u6700\u5012\u9709\u7684\u4e00\u56de\u662f\u540c\u4e8b\u4ece\u5317\u4eac\u6253\u7535\u8bdd\u8ddf\u6211\u8054\u8c03\uff0c\u4ed6\u90a3\u8fb9\u8f93\u51fa\u7684log\u51fa\u73b0\u4e71\u7801\uff0c\u800c\u6211\u8fd9\u8fb9\u4e1d\u6beb\u6ca1\u6709\uff0c\u4ed6\u901a\u8fc7IM\u7ed9\u6211\u770b\u8f93\u51fa\uff0c\u544a\u8bc9\u6211printf\u6253\u51fa\u6765\u7684\u3002\u6211\u4e0d\u76f8\u4fe1\u6211\u7684\u773c\u775b\uff0c\u597d\u50cf\u5c31\u662f\u53d8\u620f\u6cd5\u3002\u76f4\u5230\u8c03\u4e86\u597d\u4e45\u4ed6\u624d\u7a81\u7136\u8bf4\uff0c\u5662\uff01\u5fd8\u8bb0.c_str()\u4e86\uff01<br \/>\n\u5f53\u7136\u8fd9\u4ecd\u65e7\u4e0d\u662f\u597d\u65b9\u6cd5\u3002\u771f\u6b63\u95ee\u9898\u51fa\u5728printf\u4e0d\u662f\u4e00\u4e2a\u7c7b\u578b\u5b89\u5168\u7684\u51fd\u6570\uff0c\u7f16\u8bd1\u5668\u65e0\u6cd5\u4e3a\u4f60\u505a\u7f16\u8bd1\u65f6\u68c0\u67e5\u3002\u4f46\u662f\u7c7b\u4f3cprintf, sprintf\u8fd9\u7c7b\u51fd\u6570\u4f7f\u7528\u65b9\u4fbf\uff0c\u5373\u4f7f\u6700\u7ec8\u4ea7\u54c1\u4e0d\u4f7f\u7528\uff0c\u8c03\u8bd5\u9636\u6bb5\u8f93\u51falog\u8fd8\u662f\u4f1a\u7ecf\u5e38\u4f7f\u7528\u7684\u3002\u8fd9\u4e2a\u65f6\u5019\u533a\u5206std::string\u548craw string\u5c31\u53d8\u5f97\u6709\u610f\u4e49\u4e86\u3002<\/p>\n<p>\u5806\u4e0a\u7a7a\u95f4\u4f7f\u7528p\u524d\u7f00\uff0c\u800c\u6808\u4e0a\u7a7a\u95f4\u4e0d\u4f7f\u7528\u3002\u8fd9\u91cc\u4e3b\u8981\u8bf4\u7684\u662f\u6570\u7ec4\u3002\u4e3b\u8981\u76ee\u7684\u662f\u5f53\u4f60\u4f7f\u7528p\u524d\u7f00\u7684\u53d8\u91cf\u65f6\u5019\uff0c\u5c31\u4f1a\u63d0\u9192\u7740\u81ea\u5df1\u8bb0\u5f97\u601d\u8003\u8be5\u8ba9\u8c01delete\u6389\u4ed6\u8fd9\u4e2a\u95ee\u9898\u4e86\u3002<br \/>\n\u4f8b\u5982<\/p>\n<pre><code class=\"cpp\">\r\nchar szName[] = \"Peter Pan\";\r\nchar* pszName = new char[10];\r\n<\/code><\/pre>\n<p>\u6211\u5ffd\u7136\u5728\u601d\u8003\uff0c\u662f\u4e0d\u662f\u5e94\u8be5\u7528q\u524d\u7f00\u6765\u547d\u540d\u90a3\u4e9b\u5806\u7a7a\u95f4\u7684\u62e5\u6709\u8005\uff0c\u800c\u7528p\u524d\u7f00\u6765\u547d\u540d\u90a3\u4e9b\u5f31\u5f15\u7528\u3002\u4f46\u5982\u679c\u662f\u8fd9\u6837\uff0c\u90a3\u4e48\u4e0d\u660e\u62e5\u6709\u8005\uff0c\u6216\u8005\u62e5\u6709\u8005\u53d8\u66f4\u7684\u60c5\u51b5\u600e\u4e48\u529e\uff1f\u518d\u5f15\u5165\u4e00\u4e2aps\u524d\u7f00(p_shared_)\uff1f\u4e5f\u8bb8\u4f1a\u5f04\u5f97\u592a\u590d\u6742\u4e86\u3002\u4e5f\u8bb8\u65e2\u7136\u60f3\u4e86\u8fd9\u4e48\u591a\uff0c\u8fd8\u4e0d\u5982\u4e00\u5f00\u59cb\u5c31\u7528\u667a\u80fd\u6307\u9488\u3002\u4e3a\u4ec0\u4e48\u6211\u4e0d\u60f3\u5f15\u5165\u667a\u80fd\u6307\u9488\uff1f\u6211\u4e0d\u60f3\u5f15\u5165\u590d\u6742\u5ea6\u3002\u56e0\u6b64\u5982\u679c\u4ec5\u4ec5\u4e3a\u4e86\u533a\u533a\u547d\u540d\u800c\u5bfc\u81f4\u590d\u6742\u5ea6\u589e\u52a0\uff0c\u8fd8\u4e0d\u5982\u4e00\u5f00\u59cb\u5c31\u7b80\u5355\u5316\u3002\u6240\u4ee5\u8fd8\u662f\u6240\u6709\u6307\u9488\u90fd\u7528p\u524d\u7f00\u3002\u5230\u5e95\u8c01\u8d1f\u8d23\uff0c\u81ea\u5df1\u597d\u597d\u60f3\u6e05\u695a\u3002\u6211\u60f3\uff0c\u5f15\u5bfc\u8bfb\u7a0b\u5e8f\u7684\u4eba\u601d\u8003\uff0c\u6bd4\u7528\u5e26\u6709\u6697\u793a\u610f\u5473\u5374\u53ef\u80fd\u662f\u9519\u8bef\u7684\u547d\u540d\u8981\u597d\u5f97\u591a\u3002<br \/>\n\u5728\u4f7f\u7528\u5f31\u5f15\u7528\u65f6\uff0c\u6211\u7ecf\u5e38\u4f7f\u7528\u7684\u540d\u5b57\uff0c\u4f8b\u5982pRead, pWrite, pBegin, pEnd, pCurrent, \u7b49\u7b49\uff0c\u8fd9\u4e9b\u540d\u5b57\u5177\u6709\u5f3a\u70c8\u7684\u6697\u793a\u6027\uff0c\u8bf4\u660e\u4ed6\u4eec\u662f\u5f31\u5f15\u7528\uff0c\u6b63\u5e38\u4eba\u662f\u4e0d\u4f1a\u53bb\u91ca\u653e\u8fd9\u6837\u540d\u79f0\u7684\u53d8\u91cf\u7684\uff0c\u66f4\u4e0d\u4f1a\u7ed9\u8fd9\u6837\u7684\u53d8\u91cf\u5f00\u8f9f\u7a7a\u95f4\u3002\u800c\u53e6\u4e00\u4e9b\u540d\u5b57\u5219\u6bd4\u8f83\u5371\u9669\uff0c\u6bd4\u5982pNext, pChild, pParent, 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\u4e00\u8fb9\u6539\u90a3\u4e9b\u53d8\u91cf\u7684\u540d\u5b57\uff0c\u4e00\u8fb9\u5c31\u9047\u5230\u8fd9\u4e2a\u547d\u540d\u6cd5\u7684\u95ee\u9898\u3002\u6211\u8fd8\u5728\u7528\u5308\u7259\u5229\u524d\u7f00\uff0c\u6574\u6570\u7528n\uff0c\u6d6e\u70b9\u6570\u7528f\uff0c\u5b57\u7b26\u4e32\u7528sz\u3002\u73b0\u5728\u9700\u8981\u81ea\u5df1\u589e\u52a0\u51e0\u4e2a\u81ea\u5df1\u7684\u89c4\u5219\u3002 iterator\u7c7b\u578b\uff0c\u6211\u539f\u5148\u7528it\u505a\u524d\u7f00\uff0c\u6253\u51fa\u7684\u4ee3\u7801\u770b\u4e0a\u53bb\u975e\u5e38\u4e11\u964b\uff0c\u4f8b\u5982\uff1a for(std::vector&lt;Phone&gt;::iterator itPhone = phoneList.begin(), itPhoneEnd = phoneList.end(); itPhone != itPhoneEnd; ++itPhone) { \/\/&#8230; } \u5355\u7eaf\u5c31\u89c9\u5f97\u8fd9\u4e24\u4e2a\u5b57\u6bcd\u653e\u5728\u524d\u9762\u4e0d\u642d\uff0c\u4e0d\u7f8e&#8230;\u73b0\u5728\u6211\u7528\u5c0f\u5199t\u505a\u524d\u7f00\uff0c\u597d\u770b\u591a\u4e86\u3002 for(std::vector&lt;Phone&gt;::iterator tPhone = phoneList.begin(), tPhoneEnd = phoneList.end(); tPhone != tPhoneEnd; ++tPhone) { \/\/&#8230; } \u5f53\u7136\u4e86\uff0c\u8fd9\u662f\u53e4\u8463\u4ee3\u7801\u4e86\uff0c\u6709\u4e86foreach\uff0c\u8fd9\u6837\u7684\u4ee3\u7801\u5df2\u7ecf\u53ef\u4ee5\u8fdb\u5783\u573e\u5806\u4e86\u3002\u4e0d\u8fc7\u96be\u514d\u7528\u5230iterator\u7684\u65f6\u5019\u4ffa\u5c31\u8be5\u8bb0\u5f97\u7528\u8fd9\u4e2at\u524d\u7f00\u3002\u8fd8\u6709\u5c31\u662f\u9879\u76ee\u91cc\u7684\u4ee3\u7801\u6211\u4e0d\u60f3\u9730\u5f39\u67aa\u4e00\u8d77\u52a8\uff0c\u5148\u8fd9\u6837\u653e\u7740\u6bd4\u4e71\u6539\u5b89\u5168\u5f88\u591a&#8230; \u53d7\u8fd9\u4e2a\u542f\u53d1\uff0ctypedef\u51fa\u6765\u7684\u53d8\u91cf\u7c7b\u578b\u7528\u5927\u5199T\u524d\u7f00\uff0c\u4f8b\u5982 typedef std::vector&lt;Phone&gt; TPhoneList; for(TPhoneList::iterator tPhone = phoneList.begin(), tPhoneEnd = phoneList.end(); tPhone != tPhoneEnd; ++tPhone) { \/\/&#8230; } 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