{"id":1458,"date":"2024-11-16T16:18:34","date_gmt":"2024-11-16T08:18:34","guid":{"rendered":"https:\/\/aoofoo.com\/?p=1458"},"modified":"2024-11-16T16:18:34","modified_gmt":"2024-11-16T08:18:34","slug":"1-6-%e5%87%bd%e6%95%b0%e6%8c%87%e9%92%88","status":"publish","type":"post","link":"https:\/\/aoofoo.com\/index.php\/2024\/11\/16\/1-6-%e5%87%bd%e6%95%b0%e6%8c%87%e9%92%88\/","title":{"rendered":"1.6 \u51fd\u6570\u6307\u9488"},"content":{"rendered":"<div class=\"sc-star-plane sc-star-plane--1\"><div class=\"sc-star-plane__content\">\u51fd\u6570\u6307\u9488\u5355\u5f00\u4e00\u7ae0\uff0c\u8bf4\u660e\u5728MCU\u4e2d\uff0c\u51fd\u6570\u6307\u9488\u7684\u7528\u6cd5\u8f83\u4e3a\u5e38\u89c1\uff0c\u9700\u8981\u5b8c\u5168\u7406\u89e3\u51fd\u6570\u6307\u9488\u7684\u5404\u79cd\u7528\u6cd5\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u66f4\u9ad8\u6548\u7684\u5b9e\u4e60\u81ea\u5df1\u60f3\u8981\u7684\u529f\u80fd\u3002<\/div><\/div>\n<h2>\u51fd\u6570\u6307\u9488\u6982\u5ff5<\/h2>\n<p>\u51fd\u6570\u6307\u9488\uff08Function Pointer\uff09\u662f\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0c\u51fd\u6570\u7684\u5730\u5740\u53ef\u4ee5\u88ab\u4e00\u4e2a<span style=\"color: #ff9900;\"><strong>\u6307\u9488\u53d8\u91cf<\/strong><\/span>\u4fdd\u5b58\uff0c\u8fd9\u4e2a\u6307\u9488\u53d8\u91cf\u5c31\u662f\u51fd\u6570\u6307\u9488\u3002<\/p>\n<p>\u5728C\u8bed\u8a00\u4e2d\uff0c<span style=\"color: #ff9900;\"><strong>\u51fd\u6570\u4e5f\u5177\u6709\u5730\u5740<\/strong><\/span>\uff0c\u56e0\u6b64\u53ef\u4ee5\u50cf\u5904\u7406\u666e\u901a\u53d8\u91cf\u4e00\u6837\uff0c\u83b7\u53d6\u51fd\u6570\u7684\u5730\u5740\uff0c\u5e76\u901a\u8fc7\u6307\u9488\u8c03\u7528\u51fd\u6570\u3002<\/p>\n<p>\u4e3b\u8981\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li>\u52a8\u6001\u8c03\u7528\u51fd\u6570\uff1a\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\uff0c\u8c03\u7528\u4e0d\u540c\u7684\u51fd\u6570\u3002<\/li>\n<li>\u56de\u8c03\u673a\u5236\uff1a\u5c06\u51fd\u6570\u6307\u9488\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\u3002<\/li>\n<li>\u5b9e\u73b0\u591a\u6001\u6027\uff1a\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u5b9e\u73b0\u7c7b\u4f3c\u9762\u5411\u5bf9\u8c61\u7684\u591a\u6001\u7279\u6027\u3002<\/li>\n<\/ul>\n<h2>\u51fd\u6570\u6307\u9488\u7684\u58f0\u660e<\/h2>\n<pre class=\"corepress-code-pre\"><code>return_type (*pointer_name)(parameter_list);<\/code><\/pre>\n<ul>\n<li><strong><code>return_type<\/code><\/strong>\uff1a\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u3002<\/li>\n<li><strong><code>pointer_name<\/code><\/strong>\uff1a\u51fd\u6570\u6307\u9488\u7684\u540d\u79f0\u3002<\/li>\n<li><strong><code>parameter_list<\/code><\/strong>\uff1a\u53c2\u6570\u5217\u8868\uff0c\u4e0e\u51fd\u6570\u7684\u53c2\u6570\u5217\u8868\u76f8\u540c\u3002<\/li>\n<\/ul>\n<p>\u4e3e\u4f8b\uff1a\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u6307\u9488\uff0c\u6307\u5411\u8fd4\u56de int \u7c7b\u578b\u3001\u63a5\u53d7\u4e24\u4e2a int \u53c2\u6570\u7684\u51fd\u6570<\/p>\n<pre class=\"corepress-code-pre\"><code>int (*func_ptr)(int, int);<\/code><\/pre>\n<h2>\u51fd\u6570\u6307\u9488\u7684\u4f7f\u7528<\/h2>\n<p>&nbsp;<\/p>\n<ul>\n<li><strong>\u5b9a\u4e49\u51fd\u6570\u6307\u9488<\/strong>\uff1a\u6839\u636e\u76ee\u6807\u51fd\u6570\u7684\u7c7b\u578b\u548c\u53c2\u6570\u5217\u8868\uff0c\u5b9a\u4e49\u76f8\u5e94\u7684\u51fd\u6570\u6307\u9488\u3002<\/li>\n<li><strong>\u6307\u9488\u8d4b\u503c<\/strong>\uff1a\u5c06\u76ee\u6807\u51fd\u6570\u7684\u5730\u5740\u8d4b\u503c\u7ed9\u51fd\u6570\u6307\u9488\u3002<\/li>\n<li><strong>\u901a\u8fc7\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570<\/strong>\uff1a\u4f7f\u7528 <code>(*pointer_name)(arguments)<\/code> \u6216 <code>pointer_name(arguments)<\/code> \u8bed\u6cd5\u8c03\u7528\u51fd\u6570\u3002<\/li>\n<\/ul>\n<pre class=\"corepress-code-pre\"><code>#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\uff0c\u6c42\u4e24\u4e2a\u6574\u6570\u7684\u548c\r\nint add(int a, int b) {\r\n    return a + b;\r\n}\r\n\r\nint main() {\r\n    \/\/ 1. \u5b9a\u4e49\u51fd\u6570\u6307\u9488\r\n    int (*func_ptr)(int, int);\r\n\r\n    \/\/ 2. \u5c06\u51fd\u6570\u5730\u5740\u8d4b\u503c\u7ed9\u51fd\u6570\u6307\u9488\r\n    func_ptr = &amp;add;  \/\/ &amp;\u53ef\u4ee5\u7701\u7565\uff0c\u51fd\u6570\u540d\u5373\u51fd\u6570\u5730\u5740\r\n\r\n    \/\/ 3. \u901a\u8fc7\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570\r\n    int result = func_ptr(5, 3);\r\n    printf(\"Result: %d\\n\", result);  \/\/ \u8f93\u51fa\uff1aResult: 8\r\n\r\n    return 0;\r\n}<\/code><\/pre>\n<ul>\n<li><strong><code>int (*func_ptr)(int, int);<\/code><\/strong>\uff1a\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\u6307\u9488\uff0c\u6307\u5411\u8fd4\u56de <code>int<\/code> \u7c7b\u578b\u3001\u63a5\u53d7\u4e24\u4e2a <code>int<\/code> \u53c2\u6570\u7684\u51fd\u6570\u3002<\/li>\n<li><strong><code>func_ptr = &amp;add;<\/code><\/strong>\uff1a\u5c06\u51fd\u6570 <code>add<\/code> \u7684\u5730\u5740\u8d4b\u503c\u7ed9\u51fd\u6570\u6307\u9488 <code>func_ptr<\/code>\u3002\n<ul>\n<li><strong><code>&amp;<\/code> \u7b26\u53f7\u53ef\u4ee5\u7701\u7565<\/strong>\uff0c\u56e0\u4e3a\u51fd\u6570\u540d\u672c\u8eab\u5c31\u662f\u51fd\u6570\u7684\u5730\u5740\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong><code>func_ptr(5, 3);<\/code><\/strong>\uff1a\u901a\u8fc7\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570\uff0c\u4f20\u5165\u53c2\u6570 <code>5<\/code> \u548c <code>3<\/code>\u3002<\/li>\n<\/ul>\n<h2>\u51fd\u6570\u6307\u9488\u6570\u7ec4<\/h2>\n<p>\u5b9a\u4e49\u51fd\u6570\u6307\u9488\u6570\u7ec4\uff0c\u5f53\u9700\u8981\u5b58\u50a8\u591a\u4e2a\u51fd\u6570\u7684\u5730\u5740\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570\u6307\u9488\u6570\u7ec4\u3002<\/p>\n<pre class=\"corepress-code-pre\"><code>return_type (*array_name[N])(parameter_list);<\/code><\/pre>\n<ul>\n<li><strong><code>array_name<\/code><\/strong>\uff1a\u6570\u7ec4\u540d\u79f0\u3002<\/li>\n<li><strong><code>N<\/code><\/strong>\uff1a\u6570\u7ec4\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<pre class=\"corepress-code-pre\"><code>#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u5b9a\u4e49\u56db\u4e2a\u7b80\u5355\u7684\u8fd0\u7b97\u51fd\u6570\r\nint add(int a, int b) {\r\n    return a + b;\r\n}\r\n\r\nint subtract(int a, int b) {\r\n    return a - b;\r\n}\r\n\r\nint multiply(int a, int b) {\r\n    return a * b;\r\n}\r\n\r\nint divide(int a, int b) {\r\n    if (b != 0)\r\n        return a \/ b;\r\n    else {\r\n        printf(\"Division by zero!\\n\");\r\n        return 0;\r\n    }\r\n}\r\n\r\nint main() {\r\n    \/\/ \u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u6570\u7ec4\r\n    int (*operations[4])(int, int) = {add, subtract, multiply, divide};\r\n\r\n    int choice;\r\n    int x = 20, y = 10;\r\n    int result;\r\n\r\n    printf(\"Select operation: 0-Add, 1-Subtract, 2-Multiply, 3-Divide: \");\r\n    scanf(\"%d\", &amp;choice);\r\n\r\n    if (choice &gt;= 0 &amp;&amp; choice &lt; 4) {\r\n        \/\/ \u8c03\u7528\u9009\u5b9a\u7684\u51fd\u6570\r\n        result = operations[choice](x, y);\r\n        printf(\"Result: %d\\n\", result);\r\n    } else {\r\n        printf(\"Invalid choice!\\n\");\r\n    }\r\n\r\n    return 0;\r\n}<\/code><\/pre>\n<ul>\n<li><strong><code>int (*operations[4])(int, int)<\/code><\/strong>\uff1a\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5927\u5c0f\u4e3a4\u7684\u51fd\u6570\u6307\u9488\u6570\u7ec4\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u6307\u5411\u8fd4\u56de <code>int<\/code> \u7c7b\u578b\u3001\u63a5\u53d7\u4e24\u4e2a <code>int<\/code> \u53c2\u6570\u7684\u51fd\u6570\u3002<\/li>\n<li><strong>\u5c06 <code>add<\/code>\u3001<code>subtract<\/code>\u3001<code>multiply<\/code>\u3001<code>divide<\/code> \u51fd\u6570\u7684\u5730\u5740\u8d4b\u503c\u7ed9\u6570\u7ec4\u5143\u7d20\u3002<\/strong><\/li>\n<li><strong>\u6839\u636e\u7528\u6237\u8f93\u5165\uff0c\u9009\u62e9\u5bf9\u5e94\u7684\u51fd\u6570\u8fdb\u884c\u8ba1\u7b97\u3002<\/strong><\/li>\n<\/ul>\n<h2>\u56de\u8c03\u51fd\u6570<\/h2>\n<p>\u56de\u8c03\u51fd\u6570\uff08Callback Function\uff09\u662f\u4e00\u79cd\u901a\u8fc7\u51fd\u6570\u6307\u9488\u8c03\u7528\u7684\u51fd\u6570\uff0c\u901a\u5e38\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570\uff0c\u4ee5\u4fbf\u5728\u7279\u5b9a\u4e8b\u4ef6\u6216\u6761\u4ef6\u4e0b\u88ab\u8c03\u7528\u3002<\/p>\n<p>\u56de\u8c03\u51fd\u6570\u7684\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li>\u5b9e\u73b0\u7075\u6d3b\u7684\u4ee3\u7801\u7ed3\u6784<\/li>\n<li>\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u6269\u5c55\u6027\u548c\u53ef\u91cd\u7528\u6027<\/li>\n<\/ul>\n<pre class=\"corepress-code-pre\"><code>#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u6bd4\u8f83\u51fd\u6570\uff0c\u8fd4\u56de\u503c\u7c7b\u4f3cstrcmp\r\nint compare_ascending(int a, int b) {\r\n    return a - b;\r\n}\r\n\r\nint compare_descending(int a, int b) {\r\n    return b - a;\r\n}\r\n\r\n\/\/ \u5192\u6ce1\u6392\u5e8f\u51fd\u6570\uff0c\u63a5\u53d7\u56de\u8c03\u51fd\u6570\u4f5c\u4e3a\u6bd4\u8f83\u4f9d\u636e\r\nvoid bubble_sort(int arr[], int n, int (*compare)(int, int)) {\r\n    int i, j, temp;\r\n    for (i = 0; i &lt; n - 1; i++) {\r\n        for (j = 0; j &lt; n - 1 - i; j++) {\r\n            if (compare(arr[j], arr[j + 1]) &gt; 0) {\r\n                \/\/ \u4ea4\u6362\u5143\u7d20\r\n                temp = arr[j];\r\n                arr[j] = arr[j + 1];\r\n                arr[j + 1] = temp;\r\n            }\r\n        }\r\n    }\r\n}\r\n\r\nint main() {\r\n    int data[] = {5, 3, 8, 6, 2, 7, 4, 1};\r\n    int n = sizeof(data) \/ sizeof(data[0]);\r\n\r\n    \/\/ \u6392\u5e8f\uff0c\u4f7f\u7528\u5347\u5e8f\u6bd4\u8f83\u51fd\u6570\r\n    bubble_sort(data, n, compare_ascending);\r\n\r\n    printf(\"Ascending order: \");\r\n    for (int i = 0; i &lt; n; i++)\r\n        printf(\"%d \", data[i]);\r\n    printf(\"\\n\");\r\n\r\n    \/\/ \u6392\u5e8f\uff0c\u4f7f\u7528\u964d\u5e8f\u6bd4\u8f83\u51fd\u6570\r\n    bubble_sort(data, n, compare_descending);\r\n\r\n    printf(\"Descending order: \");\r\n    for (int i = 0; i &lt; n; i++)\r\n        printf(\"%d \", data[i]);\r\n    printf(\"\\n\");\r\n\r\n    return 0;\r\n}<\/code><\/pre>\n<ul>\n<li><strong><code>bubble_sort<\/code> \u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u51fd\u6570\u6307\u9488 <code>compare<\/code> \u4f5c\u4e3a\u53c2\u6570\uff0c\u7528\u4e8e\u6bd4\u8f83\u6570\u7ec4\u5143\u7d20\u3002<\/strong><\/li>\n<li><strong><code>compare_ascending<\/code> \u548c <code>compare_descending<\/code> \u662f\u7b26\u5408\u8981\u6c42\u7684\u56de\u8c03\u51fd\u6570\uff0c\u7528\u4e8e\u5b9e\u73b0\u4e0d\u540c\u7684\u6392\u5e8f\u987a\u5e8f\u3002<\/strong><\/li>\n<li><strong>\u901a\u8fc7\u4f20\u9012\u4e0d\u540c\u7684\u6bd4\u8f83\u51fd\u6570\uff0c\u5b9e\u73b0\u4e86\u6392\u5e8f\u65b9\u5f0f\u7684\u7075\u6d3b\u5207\u6362\u3002<\/strong><\/li>\n<\/ul>\n<div class=\"sc-star-plane sc-star-plane--1\"><div class=\"sc-star-plane__content\">\u51fd\u6570\u6307\u9488\u662fC\u8bed\u8a00\u4e2d\u5f3a\u5927\u800c\u7075\u6d3b\u7684\u7279\u6027\uff0c\u5141\u8bb8\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u8c03\u7528\u51fd\u6570\u3002<\/p>\n<p>\u901a\u8fc7\u51fd\u6570\u6307\u9488\uff0c\u53ef\u4ee5\u5b9e\u73b0\u56de\u8c03\u673a\u5236\u3001\u51fd\u6570\u8868\u3001\u591a\u6001\u6027\u7b49\u9ad8\u7ea7\u529f\u80fd\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n<p>\u5728\u4f7f\u7528\u51fd\u6570\u6307\u9488\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7c7b\u578b\u5339\u914d\u3001\u53ef\u8bfb\u6027\u548c\u5b89\u5168\u6027\uff0c\u907f\u514d\u51fa\u73b0\u9519\u8bef\u3002<\/div><\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u6307\u9488\u6982\u5ff5 \u51fd\u6570\u6307\u9488\uff08Function Pointer\uff09\u662f\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0c\u51fd\u6570\u7684\u5730\u5740\u53ef\u4ee5\u88ab\u4e00\u4e2a\u6307\u9488 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1458","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/comments?post=1458"}],"version-history":[{"count":1,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1458\/revisions"}],"predecessor-version":[{"id":1459,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1458\/revisions\/1459"}],"wp:attachment":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/media?parent=1458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/categories?post=1458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/tags?post=1458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}