{"id":581,"date":"2026-07-06T15:17:35","date_gmt":"2026-07-06T07:17:35","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=581"},"modified":"2026-07-06T15:17:35","modified_gmt":"2026-07-06T07:17:35","slug":"%e7%9f%a9%e9%98%b5%e4%b9%98%e6%b3%95","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/07\/06\/%e7%9f%a9%e9%98%b5%e4%b9%98%e6%b3%95\/","title":{"rendered":"\u77e9\u9635\u4e58\u6cd5"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u524d\u63d0\u6761\u4ef6\uff08\u5fc5\u987b\u6ee1\u8db3\uff0c\u5426\u5219\u65e0\u6cd5\u76f8\u4e58\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bbe\u77e9\u9635 A \u7ef4\u5ea6\uff1am \u884c n \u5217<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u77e9\u9635 B \u7ef4\u5ea6\uff1an \u884c p \u5217<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8981\u6c42\uff1aA \u7684\u5217\u6570 = B \u7684\u884c\u6570<\/strong>\uff0c\u90fd\u7b49\u4e8e n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u4e58\u7ed3\u679c\u77e9\u9635 C=A\u00d7B\uff0c\u7ef4\u5ea6\uff1am \u884c p \u5217<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u8ba1\u7b97\u516c\u5f0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ed3\u679c\u77e9\u9635\u7b2c i \u884c\u7b2c j \u5217\u5143\u7d20\uff1a <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"279\" height=\"51\" src=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/07\/image-2.png\" alt=\"\" class=\"wp-image-583\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u542b\u4e49\uff1aA \u7684\u7b2c i \u884c\uff0c\u548c B \u7684\u7b2c j \u5217\uff0c\u5bf9\u5e94\u76f8\u4e58\u518d\u5168\u90e8\u76f8\u52a0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3e\u4f8b<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"262\" height=\"285\" src=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/07\/image-1.png\" alt=\"\" class=\"wp-image-582\" style=\"aspect-ratio:0.9193442263406075;width:243px;height:auto\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u77e9\u9635\u4e58\u6cd5 A * B\n * @param {number&#91;]&#91;]} A m\u884cn\u5217\n * @param {number&#91;]&#91;]} B n\u884cp\u5217\n * @returns {number&#91;]&#91;]} m\u884cp\u5217\u7ed3\u679c\u77e9\u9635\n *\/\nfunction matrixMultiply(A, B) {\n    \/\/ \u7ef4\u5ea6\u6821\u9a8c\n    const m = A.length;\n    const n = A&#91;0].length;\n    const n2 = B.length;\n    const p = B&#91;0].length;\n    if (n !== n2) {\n        throw new Error(\"A\u7684\u5217\u6570\u5fc5\u987b\u7b49\u4e8eB\u7684\u884c\u6570\uff0c\u65e0\u6cd5\u76f8\u4e58\");\n    }\n\n    \/\/ \u521d\u59cb\u5316 m\u884cp\u5217\u51680\u77e9\u9635\n    const res = Array.from({ length: m }, () => Array(p).fill(0));\n\n    \/\/ \u4e09\u91cd\u5faa\u73af\n    for (let i = 0; i &lt; m; i++) {\n        for (let j = 0; j &lt; p; j++) {\n            let sum = 0;\n            for (let k = 0; k &lt; n; k++) {\n                sum += A&#91;i]&#91;k] * B&#91;k]&#91;j];\n            }\n            res&#91;i]&#91;j] = sum;\n        }\n    }\n    return res;\n}\n\n\/\/ \u6d4b\u8bd5\nconst A = &#91;\n    &#91;1, 2],\n    &#91;3, 4]\n];\nconst B = &#91;\n    &#91;5, 6],\n    &#91;7, 8]\n];\nconsole.log(matrixMultiply(A, B));\n\/\/ &#91; &#91;19,22], &#91;43,50] ]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u524d\u63d0\u6761\u4ef6\uff08\u5fc5\u987b\u6ee1\u8db3\uff0c\u5426\u5219\u65e0\u6cd5\u76f8\u4e58\uff09 \u8bbe\u77e9\u9635 A..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,11],"tags":[],"class_list":["post-581","post","type-post","status-publish","format-standard","hentry","category-js","category-front"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/js\/\" rel=\"category tag\">JS<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/\" rel=\"category tag\">\u524d\u7aef<\/a>","tag_info":"\u524d\u7aef","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=581"}],"version-history":[{"count":1,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/581\/revisions"}],"predecessor-version":[{"id":584,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/581\/revisions\/584"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}