{"id":134601,"date":"2022-02-27T04:07:44","date_gmt":"2022-02-26T20:07:44","guid":{"rendered":"http:\/\/www.idc.net\/help\/134601\/"},"modified":"2022-02-27T04:07:44","modified_gmt":"2022-02-26T20:07:44","slug":"linux%e4%b8%addim%e7%9a%84%e5%90%ab%e4%b9%89%e7%ae%80%e4%bb%8b-linux%e4%b8%addim%e6%98%af%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/134601\/","title":{"rendered":"Linux\u4e2ddim\u7684\u542b\u4e49\u7b80\u4ecb (linux\u4e2ddim\u662f\u4ec0\u4e48\u610f\u601d)"},"content":{"rendered":"<p>\u5728Linux\u4e2d\uff0cdim\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u547d\u4ee4\uff0c\u5b83\u7528\u4e8e\u63a7\u5236\u7ec8\u7aef\u6216\u63a7\u5236\u53f0\u7684\u5c4f\u5e55\u4eae\u5ea6\u3002\u4e0e\u5176\u4ed6\u547d\u4ee4\u4e0d\u540c\u7684\u662f\uff0cdim\u547d\u4ee4\u4e0d\u4f1a\u6539\u53d8\u989c\u8272\u6216\u6587\u672c\u7684\u5916\u89c2\uff0c\u5b83\u53ea\u4f1a\u6539\u53d8\u5c4f\u5e55\u7684\u4eae\u5ea6\u3002<\/p>\n<p>dim\u547d\u4ee4\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5c24\u5176\u662f\u5728\u8fd0\u884c\u65f6\u9700\u8981\u8c03\u6574\u5c4f\u5e55\u4eae\u5ea6\u7684\u60c5\u51b5\u4e0b\u3002\u5b83\u6700\u5e38\u89c1\u7684\u7528\u9014\u662f\u5728\u665a\u4e0a\u6216\u9ed1\u6697\u7684\u623f\u95f4\u4e2d\u8c03\u6574\u5c4f\u5e55\u4eae\u5ea6\uff0c\u4ee5\u907f\u514d\u773c\u775b\u75b2\u52b3\u548c\u5934\u75db\u7b49\u95ee\u9898\u3002<\/p>\n<p>dim\u547d\u4ee4\u7684\u8bed\u6cd5\u975e\u5e38\u7b80\u5355\u3002\u5b83\u53ea\u9700\u8981\u4e00\u4e2a\u6574\u6570\u53c2\u6570\uff0c\u8be5\u53c2\u6570\u6307\u5b9a\u5c4f\u5e55\u7684\u4eae\u5ea6\u7ea7\u522b\u3002\u8fd9\u4e2a\u7ea7\u522b\u7684\u53d6\u503c\u8303\u56f4\u901a\u5e38\u662f\u4ece0\u5230255\uff0c\u5176\u4e2d0\u8868\u793a\u6700\u6697\u7684\u5c4f\u5e55\u4eae\u5ea6\uff0c\u800c255\u8868\u793a\u6700\u4eae\u7684\u5c4f\u5e55\u4eae\u5ea6\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8981\u5c06\u5c4f\u5e55\u4eae\u5ea6\u8c03\u6574\u4e3a100\u7ea7\u522b\uff0c\u53ea\u9700\u5728\u7ec8\u7aef\u4e2d\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\u5373\u53ef\uff1a<\/p>\n<p>$ dim 100<\/p>\n<p>\u5f53\u547d\u4ee4\u8fd0\u884c\u65f6\uff0c\u5c4f\u5e55\u7684\u4eae\u5ea6\u5c06\u4f1a\u968f\u7740\u547d\u4ee4\u53c2\u6570\u7684\u53d8\u5316\u800c\u53d1\u751f\u53d8\u5316\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u53c2\u6570\u503c\u6765\u83b7\u5f97\u6240\u9700\u7684\u5c4f\u5e55\u4eae\u5ea6\uff0c\u4ee5\u8fbe\u5230\u66f4\u4f73\u7684\u89c6\u89c9\u6548\u679c\u3002<\/p>\n<p>\u5c3d\u7ba1dim\u547d\u4ee4\u975e\u5e38\u7b80\u5355\uff0c\u4f46\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u4e8b\u9879\u3002\u7279\u522b\u662f\u5728\u4f7f\u7528\u4ee5\u524d\uff0c\u9700\u8981\u5148\u786e\u4fdd\u8ba1\u7b97\u673a\u4e0a\u5df2\u5b89\u88c5\u4e86\u5408\u9002\u7684\u786c\u4ef6\u548c\u9a71\u52a8\u7a0b\u5e8f\u3002\u5982\u679c\u6ca1\u6709\u5b89\u88c5\u9a71\u52a8\u7a0b\u5e8f\uff0c\u8be5\u547d\u4ee4\u53ef\u80fd\u4e0d\u4f1a\u8d77\u4f5c\u7528\u6216\u4ea7\u751f\u4e0d\u826f\u6548\u679c\u3002<\/p>\n<p>\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u6ce8\u610f\u5c4f\u5e55\u4eae\u5ea6\u7684\u8c03\u6574\u4e0d\u5e94\u8be5\u8fc7\u5ea6\u6216\u53cd\u590d\u3002\u8fd9\u4e9b\u505a\u6cd5\u4f1a\u5bf9\u4eba\u773c\u9020\u6210\u635f\u4f24\uff0c\u5e76\u5bfc\u81f4\u773c\u75b2\u52b3\u3001\u5934\u75db\u3001\u8fd1\u89c6\u7b49\u95ee\u9898\u3002\u6240\u4ee5\u5e94\u8be5\u5728\u5fc5\u8981\u65f6\u4f7f\u7528\u8fd9\u4e2a\u547d\u4ee4\uff0c\u800c\u4e0d\u662f\u53cd\u590d\u4f7f\u7528\u3002<\/p>\n<p>\u5728Linux\u4e2ddim\u547d\u4ee4\u662f\u4e00\u4e2a\u5f88\u6709\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u8ba9\u7528\u6237\u6839\u636e\u9700\u8981\u6765\u8c03\u6574\u5c4f\u5e55\u4eae\u5ea6\uff0c\u4ece\u800c\u51cf\u5c11\u89c6\u89c9\u75b2\u52b3\u548c\u5176\u4ed6\u76f8\u5173\u95ee\u9898\u7684\u51fa\u73b0\u3002\u4e0d\u8fc7\uff0c\u5728\u4f7f\u7528\u4e4b\u524d\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u5b89\u88c5\u9a71\u52a8\u7a0b\u5e8f\u7684\u4e8b\u9879\u4ee5\u53ca\u8c03\u6574\u4e0d\u5e94\u8be5\u8fc7\u5ea6\u548c\u53cd\u590d\u4f7f\u7528\u7684\u65b9\u5411\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>__max\u51fd\u6570\u5728linux\u4e2d\u62a5\u9519<\/li>\n<li>linux\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u9a8c<\/li>\n<\/ul>\n<h3>__max\u51fd\u6570\u5728linux\u4e2d\u62a5\u9519<\/h3>\n<p>MAX\u51fd\u6570\u5199\u6cd5\uff1a<\/p>\n<p> \u51fd\u6570max\u51fd\u6570\u7528\u4e8e\u6c42\u5411\u91cf\u6216\u8005\u77e9\u9635\u7684\u6700\u94fe\u6089\u5927\u5143\u7d20\uff0c\u6216\u51e0\u4e2a\u6307\u5b9a\u503c\u4e2d\u7684\u66f4\u5927\u503c\u3002MATLAB\u7b49\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\u4e2d\u5e38\u7528\u6709\u4e09\u79cd\u5f62\u5f0f\uff1amax(A)\u3001max(A,B)\u3001max(A,,dim)\u3002<\/p>\n<p> \u4f7f\u7528<\/p>\n<p> \u5982\u679cMAX\u51fd\u6570\u4e2d\u7684\u53c2\u6570\u4e3a\u9519\u8bef\u503c\u6216\u4e0d\u80fd\u8f6c\u6362\u6210\u6570\u5b57\u7684\u6587\u672c\uff0c\u5c06\u4ea7\u751f\u9519\u8bef\u3002\u5982\u679c\u53c2\u6570\u4e3a\u6570\u7ec4\u6216\u5f15\u90d1\u85af\u7528\uff0c\u5219\u53ea\u6709\u6570\u7ec4\u6216\u5f15\u7528\u4e2d\u7684\u6570\u5b57\u5c06\u88ab\u8ba1\u7b97\u558a\u5524\u8005\u3002\u6570\u7ec4\u6216\u5f15\u7528\u4e2d\u7684\u7a7a\u767d\u5355\u5143\u683c\u3001\u903b\u8f91\u503c\u6216\u6587\u672c\u5c06\u88ab\u5ffd\u7565\u3002\u5982\u679c\u903b\u8f91\u503c\u548c\u6587\u672c\u4e0d\u80fd\u5ffd\u7565\uff0c\u8bf7\u4f7f\u7528\u51fd\u6570 MAXA \u6765\u4ee3\u66ff\u3002<\/p>\n<h3>linux\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u9a8c<\/h3>\n<p>adfweofkjpwzs2fs6f<\/p>\n<p>\u4f60\u8ff9\u886b\u8fd9\u76f8\u5f53\u4e8e\u53eb\u4eba\u5199\u4e2ashell\u2026 <\/p>\n<p>\u5177\u4f53\u5b9e\u73b0\u601d\u8def\u5e94\u8be5\u6709\u4e24\u79cd<\/p>\n<p>A.\u7528system\u51fd\u6570\u8c03dos\u547d\u4ee4\u6765\u5b9e\u73b0\uff0c\u8fd9\u5176\u5b9e\u662f\u53d6\u5de7\u4e86\u3002<\/p>\n<p>B.\u5b8c\u5168\u81ea\u5df1\u771f\u6b63\u5199\u4e2a\u547d\u4ee4\u89e3\u91ca\u7a0b\u5e8f\u3002\u8fd9\u53ef\u4ee5\u5206\u6210\u4e09\u6b65\u6765\u5b9e\u73b0<\/p>\n<p>\u4e4b\u4e00\u6b65<\/p>\n<p>\u8981\u81ea\u5df1\u8bbe\u8ba1\u59ff\u5c18\u8154\u4e00\u4e2a\u5185\u90e8\u547d\u4ee4\u8868\uff0c\u6309\u4f60\u7684\u8981\u6c42\uff0c\u91c7\u7528\u6a21\u5757\u5316\u7684\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u8868\u5c31\u7528\u7ed3\u6784\u4f53\u6765\u505a<\/p>\n<p>struct cmd_table{<\/p>\n<p>char * cmd_name ; \/\/\u5185\u90e8\u547d\u4ee4\u540d\u5b57\u7b26\u4e32<\/p>\n<p>void ( * cmd_func) (void) ;\/\/\u6307\u5411\u5bf9\u5e94\u4e8e\u5185\u90e8\u547d\u4ee4\u51fd\u6570\u7684\u6307\u9488<\/p>\n<p>}<\/p>\n<p>commands = {<\/p>\n<p>\u201d DIR\u201d ,dir ,<\/p>\n<p>\u201d COP\u201d ,cop ,<\/p>\n<p>\u201d ERA\u201d ,era ,<\/p>\n<p>\u201d DIS\u201d ,dis ,<\/p>\n<p>\u201cEND\u201d,end,<\/p>\n<p>} ;<\/p>\n<p>\/\/\u8981\u8fbe\u5230\u771f\u6b63\u7684\u9762\u5411\u5bf9\u8c61\u6a21\u5757\u5316\u7f16\u5144\u65c1\u7a0b\uff0c \u53ef\u4ee5\u518d\u5b9a\u4e49\u4e2a\u7ef4\u6570\u5b8f\uff0c\u6765\u8ba9\u641c\u7d22\u5185\u90e8\u547d\u4ee4\u8868\u65f6\u80fd\u786e\u5207<\/p>\n<p>\u77e5\u9053\u5185\u90e8\u547d\u4ee4\u8868\u4e2d\u5185\u90e8\u547d\u4ee4\u7684\u6570\u76ee\u3002<\/p>\n<p># define dim ( x)(sizeof(x)\/sizeof (x ))<\/p>\n<\/p>\n<p>\u7b2c\u4e8c\u6b65<\/p>\n<p>\u83b7\u53d6\u952e\u76d8\u547d\u4ee4 <\/p>\n<p>void get cmdln (char * cmd_buffer)<\/p>\n<p>{<\/p>\n<p>show_prompt() ; \/*\u663e\u793a\u547d\u4ee4\u63d0\u793a\u7b26*\/<\/p>\n<p>get_cmd (cmd_b uffer) ; \/*\u83b7\u53d6\u952e\u76d8\u547d\u4ee4\u884c\u5e76\u8fdb\u884c\u5927\u5c0f\u5199*\/<\/p>\n<p>take_para (cmd_buffer) ; \/*\u5206\u79bb\u51fa\u547d\u4ee4\u540d\u53ca\u53c2\u6570*\/<\/p>\n<p>} <\/p>\n<p>\u5475\u5475\uff0c\u62b1\u6b49\uff0c\u6211\u8981\u8d76\u98de\u673a\u53bb\u4e86\uff0c\u4e0b\u9762\u7684\u6211\u4ee5\u540e\u5728\u5199\u3002\u3002\u3002\u3002\u3002<\/p>\n<p>\u9884\u795d\u56fd\u5e86\u8282\u5feb\u4e50\uff01\uff01\uff01\uff01<\/p>\n<p>\u7528alias\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e86\uff01\u5199\u4e00\u4e2aSHELL<\/p>\n<p>linux\u4e2ddim\u662f\u4ec0\u4e48\u610f\u601d\u7684\u4ecb\u7ecd\u5c31\u804a\u5230\u8fd9\u91cc\u5427\uff0c\u611f\u8c22\u4f60\u82b1\u65f6\u95f4\u9605\u8bfb\u672c\u7ad9\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8elinux\u4e2ddim\u662f\u4ec0\u4e48\u610f\u601d,Linux\u4e2ddim\u7684\u542b\u4e49\u7b80\u4ecb,__max\u51fd\u6570\u5728linux\u4e2d\u62a5\u9519,linux\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u9a8c\u7684\u4fe1\u606f\u522b\u5fd8\u4e86\u5728\u672c\u7ad9\u8fdb\u884c\u67e5\u627e\u5594\u3002<\/p>\n<p><a href=\"http:https:\/\/idc.net\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002<br \/>\u540e\u6d6a\u4e91\uff08www.IDC.Net\uff09\u63d0\u4f9b\u7b80\u5355\u597d\u7528\uff0c\u4ef7\u683c\u539a\u9053\u7684\u9999\u6e2f\/\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u548c\u72ec\u7acb\u670d\u52a1\u5668\u3002IDC+ISP+ICP\u8d44\u8d28\u3002ARIN\u548cAPNIC\u4f1a\u5458\u3002\u6210\u719f\u6280\u672f\u56e2\u961f15\u5e74\u884c\u4e1a\u7ecf\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Linux\u4e2d\uff0cdim\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u547d\u4ee4\uff0c\u5b83\u7528\u4e8e\u63a7\u5236\u7ec8\u7aef\u6216\u63a7\u5236\u53f0\u7684\u5c4f\u5e55\u4eae\u5ea6\u3002\u4e0e\u5176\u4ed6\u547d\u4ee4\u4e0d\u540c\u7684\u662f\uff0cdim\u547d\u4ee4\u4e0d\u4f1a\u6539 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-134601","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/134601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=134601"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/134601\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=134601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=134601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=134601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}