{"id":59,"date":"2025-10-14T14:37:59","date_gmt":"2025-10-14T06:37:59","guid":{"rendered":"http:\/\/47.99.178.170\/?p=59"},"modified":"2025-10-23T21:50:01","modified_gmt":"2025-10-23T13:50:01","slug":"%e3%80%90%e7%bc%96%e7%a8%8b%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%e3%80%91c%e8%af%ad%e8%a8%80%e6%95%b0%e7%bb%84%e4%b8%8e%e6%8c%87%e9%92%88%e4%bd%bf%e7%94%a8%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/www.garfield-blog.top\/?p=59","title":{"rendered":"\u3010\u7f16\u7a0b\u8bed\u8a00\u5b66\u4e60\u3011C\u8bed\u8a00\u6570\u7ec4\u4e0e\u6307\u9488\u4f7f\u7528\u6280\u5de7"},"content":{"rendered":"\n<p>\u6570\u7ec4\u4e0e\u6307\u9488\u5e38\u5e38\u51fa\u73b0\u8bb8\u591a\u795e\u5947\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u548c\u53ef\u80fd\u9047\u5230\u7684\u5bb9\u6613\u8e29\u5751\u7684\u70b9<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u7ec4\u540d\u662f\u4e0d\u662f\u6307\u9488<\/h2>\n\n\n\n<p>\u5728\u7533\u8bf7\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0c\u5176\u5185\u5b58\u7a7a\u95f4\u88ab\u5206\u4e3a\u4e86\u4e24\u90e8\u5206<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u7ec4\u540d\u88ab\u5b58\u653e\u5728\u4e86\u5e38\u91cf\u5185\u5b58\u533a\uff0c\u662f\u4e0d\u53ef\u4fee\u6539\u7684<\/li>\n\n\n\n<li>\u6570\u7ec4\u5143\u7d20\u662f\u5b58\u653e\u5728\u53ef\u53d8\u5185\u5b58\u533a\uff0c\u662f\u53ef\u4ee5\u4fee\u6539\u7684<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>char str&#91;3] = {'a', 'b', 'c'};\nprintf(\"str = %p str&#91;0] = %p str&#91;1] = %p str&#91;2] = %p\", &amp;str, &amp;str&#91;0], &amp;str&#91;1], &amp;str&#91;2]);\n\/**\n * \u8f93\u51fa\u7ed3\u679c\uff1a\n * str = 0x7ffe1b1a6ea5 str&#91;0] = 0x7ffe1b1a6ea5 str&#91;1] = 0x7ffe1b1a6ea6 str&#91;2] = 0x7ffe1b1a6ea7\n *\/\n\n\nchar str&#91;3] = {'a', 'b', 'c'};\nprintf(\"str = %p str&#91;0] = %p str&#91;1] = %p str&#91;2] = %p\", str, str&#91;0], str&#91;1], str&#91;2]);\n\/**\n * \u591a\u6b21\u8fd0\u884c\u540e\u8f93\u51fa\u7ed3\u679c\uff1a\n * str = 0x7ffd2afb3055 str&#91;0] = 0x61 str&#91;1] = 0x62 str&#91;2] = 0x63\n * str = 0x7fff4e277f15 str&#91;0] = 0x61 str&#91;1] = 0x62 str&#91;2] = 0x63\n * str = 0x7ffdd057c805 str&#91;0] = 0x61 str&#91;1] = 0x62 str&#91;2] = 0x63\n * str = 0x7ffcc01f0fe5 str&#91;0] = 0x61 str&#91;1] = 0x62 str&#91;2] = 0x63\n * str = 0x7ffcbe2cce35 str&#91;0] = 0x61 str&#91;1] = 0x62 str&#91;2] = 0x63\n *\/<\/code><\/pre>\n\n\n\n<p>\u4ece\u7b2c\u4e00\u6bb5\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u6570\u7ec4\u540d\u548c\u6570\u7ec4<code>0<\/code>\u53f7\u5143\u7d20<strong>\u6240\u5728\u7684\u5185\u5b58\u5730\u5740<\/strong>\u662f\u76f8\u540c\u7684\uff0c\u5e76\u4e14\u548c\u6570\u7ec4\u5176\u4ed6\u5143\u7d20\u7684<strong>\u6240\u5728\u7684\u5185\u5b58\u662f\u8fde\u7eed\u7684<\/strong>\uff1b\u4ece\u7b2c\u4e8c\u6bb5\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u6570\u7ec4\u540d<strong>\u6307\u5411\u7684\u5730\u5740<\/strong>\u662f\u6bcf\u6b21\u91cd\u65b0\u5206\u914d\u7684\u4e14\u5728\u5e38\u91cf\u5185\u5b58\u533a\u662f<strong>\u4e0d\u53ef\u66f4\u6539\u7684<\/strong>\uff0c\u6570\u7ec4\u7684<code>0<\/code>\u5143\u7d20\u6307\u5411\u7684\u5730\u5740\u5219\u662f\u6307\u5411\u6570\u7ec4\u7684\u9996\u4e2a\u5143\u7d20<\/p>\n\n\n\n<p>\u7531\u4e8e\u8fd9\u4e2a\u7279\u6027\uff0c\u6570\u7ec4\u540d\u4e0e\u6307\u9488\u5e76\u4e0d\u80fd\u5b8c\u5168\u89c6\u4f5c\u7b49\u4ef7<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u6307\u9488\u8fd0\u7b97\u83b7\u53d6\u6570\u7ec4\u503c<\/h2>\n\n\n\n<p>\u5982\u679c\u6709\u6570\u7ec4\u5982\u4e0b\uff0c\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\u5982\u679c\u76f4\u63a5\u5bf9<code>a<\/code>\u53d6\u504f\u79fb\u91cf\u5b9e\u9645\u4e0a\u662f\u504f\u79fb\u6574\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u6570\u7ec4\u5143\u7d20\u7684\u957f\u5ea6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int a&#91;5] = {1, 2, 3, 4, 5}<\/code><\/pre>\n\n\n\n<p><strong>\u5bf9\u6570\u7ec4\u540d\u76f4\u63a5\u53d6\u504f\u79fb<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/** \n * \u5148\u83b7\u901a\u8fc7\u8131\u89e3\u5f15\u7528\u7b26\u53d6\u6570\u7ec4\u7684\u9996\u5143\u7d20\u5730\u5740\u518d\u52a0\u4e00\u53d6\u504f\u79fb\u503c\uff0c\u5b9e\u9645\u4e0a\u504f\u79fb\u503cn\u4e2a\uff08n\u662f\u6570\u7ec4\u5143\u7d20\u6570\u91cf\uff09\u6570\u7ec4\u5143\u7d20\u7684\u957f\u5ea6\u3002\u5982\u52a0\u4e8c\u53d6\u504f\u79fb\u503c\u5219\u662f\u504f\u79fb\u4e862n\u4e2a\u6570\u7ec4\u5143\u7d20\u7684\u957f\u5ea6\n * p\u6307\u5411\u7684\u662f\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u518d\u5411\u540e\u504f\u79fb\u4e00\u4e2a\u5143\u7d20\u957f\u5ea6\u7684\u5730\u5740\n *\/\nint *p = &amp;a + 1;<\/code><\/pre>\n\n\n\n<p><strong>\u901a\u8fc7\u6570\u7ec4\u540d\u504f\u79fb\u83b7\u53d6\u6570\u7ec4\u5143\u7d20<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u5148\u53d6\u504f\u79fb\u91cf\u518d\u901a\u8fc7\u89e3\u5f15\u7528\u7b26\u83b7\u53d6\u503c\uff0c\u5b9e\u9645\u4e0a\u662f\u504f\u79fb\u4e86\u6570\u7ec4\u4e00\u4e2a\u5143\u7d20\u7684\u957f\u5ea6\n * p\u7b49\u4e8e\u9996\u5143\u7d20\u7684\u7684\u503c\n *\/ \nint p = *(a + 1);\n\n\/**\n * \u5bf9\u4e0a\u9762\u7684\u7ed3\u679c\u518d\u6b21\u8131\u89e3\u5f15\u7528\u83b7\u53d6\u7684\u624d\u662f\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\n *\/ \nint *p = &amp;(*(a + 1));<\/code><\/pre>\n\n\n\n<p><strong>\u5b9e\u4f8b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;stdio.h&gt;\n\nint main(int argc,char *argv&#91;])\n{\n    int a&#91;5] = {1, 2, 3, 4, 5};\n    int *ptr = (int *)(&amp;a+1);\n\n    printf(\"%d, %d\",*(a+2), *(ptr-1));\n\n    return 0;\n}\n\/**\n * \u8f93\u51fa\u7ed3\u679c\n * 3\uff0c4\n *\/<\/code><\/pre>\n\n\n\n<p>\u5bf9\u4e8e\u4e0a\u9762\u7684\u5b9e\u4f8b\u4f7f\u7528<code>GDB<\/code>\u67e5\u770b\u5185\u5b58\u5730\u5740\uff0c\u53ef\u4ee5\u66f4\u597d\u7684\u5e2e\u52a9\u7406\u89e3\u8fd9\u4e00\u8282\u7684\u5185\u5bb9<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u6307\u9488\u504f\u79fb\u548c\u6570\u7ec4\u540d\u504f\u79fb\u5730\u5740\u67e5\u770b.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1155\" height=\"541\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u6307\u9488\u504f\u79fb\u548c\u6570\u7ec4\u540d\u504f\u79fb\u5730\u5740\u67e5\u770b.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-256\"  sizes=\"auto, (max-width: 1155px) 100vw, 1155px\" \/><\/div><\/figure>\n\n\n\n<p>\u4e0a\u56fe\u4e2d\u5217\u51fa\u7684\u5730\u5740\u5b9e\u9645\u542b\u4e49\u53ef\u4ee5\u53c2\u8003\u4e0b\u6587<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u76f4\u63a5\u901a\u8fc7\u6570\u7ec4\u540d\u8131\u89e3\u5f15\u7528\u518d\u504f\u79fb\n * &amp;(a)&#91;X]\u4e0e&amp;(a)+X\u4e24\u79cd\u5199\u6cd5\u8bed\u6cd5\u4e0a\u7b49\u4ef7\uff0c\u4e0b\u6587\u4ec5\u8d34\u51fa\u4e00\u79cd\u5199\u6cd5\uff0c\u7b49\u4ef7\u8bed\u6cd5\u4e0d\u505a\u8d58\u8ff0\n *\/\n&amp;a = 0x7fffffffde40\n&amp;a+1 = 0x7fffffffde54        \/\/ \u4e0e&amp;(a)&#91;5]\u76f8\u540c\n&amp;a+2 = 0x7fffffffde68        \/\/ \u4e0e&amp;(a)&#91;10]\u76f8\u540c\n&amp;(a)&#91;0] = 0x7fffffffde40    \n&amp;(a)&#91;1] = 0x7fffffffde44\n&amp;(a)&#91;2] = 0x7fffffffde48\n&amp;(a)&#91;3] = 0x7fffffffde4c\n&amp;(a)&#91;4] = 0x7fffffffde50\n&amp;(a)&#91;5] = 0x7fffffffde54    \/\/ \u4e0e&amp;a+1\u76f8\u540c\n&amp;(a)&#91;10] = 0x7fffffffde68    \/\/ \u4e0e&amp;a+2\u76f8\u540c\n\n\/**\n * int *ptr = (int *)(&amp;a+1)\n *\/\nprt = 0x7fffffffde54        \/\/ \u4e0e&amp;a+1\u548c&amp;(a)&#91;5]\u76f8\u540c\n\n\/**\n * \u901a\u8fc7\u5bf9\u6570\u7ec4\u540d\u504f\u79fb\u540e\u89e3\u5f15\u7528\u53d6\u5143\u7d20\u7684\u503c\n *\/\n*(a) = 1\n*(a+1) = 2\n*(a+2) = 3\n*(a+3) = 4\n*(a+4) = 5\n*(a+5) = 32767        \/\/ \u810f\u6570\u636e\n\n\/**\n * \u901a\u8fc7\u6570\u7ec4\u540d\u504f\u79fb\u540e\u89e3\u5f15\u7528\u53d6\u5143\u7d20\u7684\u5730\u5740\n *\/\n&amp;(*(a+0)) = 0x7fffffffde40\n&amp;(*(a+1)) = 0x7fffffffde44\n&amp;(*(a+2)) = 0x7fffffffde48\n&amp;(*(a+3)) = 0x7fffffffde4c\n&amp;(*(a+4)) = 0x7fffffffde50\n&amp;(*(a+5)) = 0x7fffffffde54<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ed3\u6784\u4f53\u53ef\u53d8\u957f\u5ea6\u7684\u52a8\u6001\u7533\u8bf7\u5185\u5b58<\/h2>\n\n\n\n<p>\u5728<code>C<\/code>\u8bed\u8a00\u4e2d\u64cd\u4f5c\u5b57\u7b26\u4e32\u901a\u5e38\u662f\u521b\u5efa\u4e00\u4e2a<code>char<\/code>\u6570\u7ec4\u6216\u8005\u4e00\u4e2a<code>char*<\/code>\u6307\u9488\u6307\u5411\u67d0\u4e2a\u5b57\u7b26\u4e32\u3002\u662f\u76f4\u63a5\u64cd\u4f5c\u5185\u5b58\uff0c\u5e38\u5e38\u5f15\u53d1\u4e00\u4e9b\u5185\u5b58\u5b89\u5168\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528\u65f6\u7684\u6ce8\u610f\u4e8b\u9879<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06<code>C<\/code>\u8bed\u8a00\u8f6c\u6362\u6210\u6c47\u7f16\u540e\u53ef\u4ee5\u53d1\u73b0\uff0c<code>[]<\/code>\u8fd0\u7b97\u7b26\u5176\u672c\u8d28\u662f\u53d6\u5730\u5740\u504f\u79fb\u91cf\uff0c\u8fd9\u4e0e\u6307\u9488\u8fd0\u7b97\u76f8\u540c<\/li>\n\n\n\n<li>\u901a\u5e38\u4f1a\u5c06<code>char<\/code>\u6570\u7ec4\u7684\u540d\u5b57\u89c6\u4e3a\u4e00\u4e2a<code>char*<\/code>\u6307\u9488\uff0c\u4f46\u8fd9\u4e24\u8005\u5e76\u4e0d\u4e25\u683c\u76f8\u7b49\n<ul class=\"wp-block-list\">\n<li>\u6570\u7ec4\u540d\u6307\u5411\u7684\u5185\u5b58\u4e0d\u53ef\u66f4\u6539\uff0c\u6307\u9488\u6307\u5411\u7684\u5185\u5b58\u53ef\u66f4\u6539\u3002\u4f46\u4e8c\u8005\u90fd\u4e0d\u53ef\u66f4\u6539\u5176\u672c\u8eab\u7684\u5185\u5b58\u5730\u5740<\/li>\n\n\n\n<li>\u5728<code>struct<\/code>\u58f0\u660e\u65f6\uff0c\u6709\u65f6\u4f1a\u5728<code>struct<\/code>\u5c3e\u90e8\u52a0\u4e0a\u4e00\u884c<code>char[0]<\/code>\uff0c\u8fd9\u79cd\u5199\u6cd5\u662f\u8003\u8651\u5230\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50\u9ed8\u8ba4\u6309\u7167\u6700\u957f\u5143\u7d20\u6765\u5bf9\u9f50\u3002\u5f53\u4e0d\u9002\u5408\u5728\u58f0\u660e\u65f6\u521b\u5efa\u5927\u6570\u7ec4\u53ef\u4ee5\u540e\u7eed\u7533\u8bf7\u5185\u5b58\u65f6\u53ef\u4ee5\u7075\u6d3b\u7684\u786e\u5b9a\u7533\u8bf7\u5185\u5b58\u7684\u957f\u5ea6\uff0c\u5b9e\u73b0\u53d8\u957f\u7533\u8bf7\u5185\u5b58\u3002\u4f8b\u5982\u6d88\u606f\u4fe1\u606f\u7b49\u5185\u5bb9\uff0c\u7ed3\u6784\u4f53\u7533\u8bf7\u65f6\u9700\u8981\u4e00\u4e2a\u53d8\u957f\u7684\u5b57\u7b26\u4e32\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>struct struct_A {\n    int a;\n    char b&#91;1];\t\t\t\/\/char&#91;1]\u4f1a\u5360\u7528\u4e00\u4e2a\u5b57\u8282\u7684\u5185\u5b58\n}__attribute ((packed));\n\n\/* \n * \u5982\u679c\u5206\u914d\u7684\u5185\u5b58\u5927\u4e8e\u7ed3\u6784\u4f53\u7684\u5b9e\u9645\u5927\u5c0f\uff0c\u90a3\u4e48\u8d85\u51fa\u7684\u90a3\u90e8\u5206\u5c31\u662fb\u7684\u5185\u5bb9\u3002\n *\/\nstruct struct_B {\n    int a;\n    char b&#91;0];\t\t\t\/\/charb&#91;0]\u5b9e\u9645\u4e0d\u5360\u7528\u7684\u5185\u5b58\uff0c\u53ea\u662f\u4e00\u4e2a\u5730\u5740\u504f\u79fb\u91cf\n}__attribute ((packed));\n\nint main()\n{\n    struct struct_A A;\n    struct struct_B B;\n\n    int a = sizeof(A);\n    printf(\"%d \\n\", a);\t\t\/\/\u8f93\u51fa\uff1a5\n\n    int b = sizeof(B);\n    printf(\"%d \\n\", b);\t\t\/\/\u8f93\u51fa\uff1a4\n    \n    struct struct_B *C;\n    C = (struct struct_B *)malloc(sizeof(struct struct_B) + 10);\n\n    strcpy(C-&gt;b, \"abcde\");\n    printf(\"%s \\n\", C-&gt;b);\t\/\/\u8f93\u51fa\uff1aabcde\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">C\u8bed\u8a00\u600e\u4e48\u5b9e\u73b0&#8221;\u7ee7\u627f&#8221;<\/h2>\n\n\n\n<p><code>C<\/code>\u8bed\u8a00\u6ca1\u6709\u7c7b\u4e5f\u6ca1\u6709\u7ee7\u627f\u7684\u7279\u6027\uff0c\u662f\u600e\u4e48\u505a\u5230&#8221;\u7ee7\u627f&#8221;\u7684\u6548\u679c\uff1b\u5728<code>C<\/code>\u8bed\u8a00\u91cc\uff0c\u7ed3\u6784\u4f53\u91cc\u7684\u5185\u5b58\u662f\u8fde\u7eed\u7684\uff0c\u5c06\u8981\u7ee7\u627f\u7684&#8221;\u7236\u7c7b&#8221;\uff0c\u653e\u5230\u7ed3\u6784\u4f53\u7684\u7b2c\u4e00\u4f4d\uff0c\u7136\u540e\u5c06\u6307\u5411\u201c\u7236\u7ed3\u6784\u4f53\u201d\u7684\u5934\u90e8\uff0c\u7136\u540e\u901a\u8fc7\u6307\u9488\u7c7b\u578b\u8f6c\u6362\u83b7\u53d6\u201c\u7236\u7ed3\u6784\u4f53\u201d\u7684\u5934\u90e8\u7684\u201c\u5b50\u7ed3\u6784\u4f53\u201d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>struct stu_1 {\n    char stu_1_a&#91;8];\n    int stu_1_b;\n    double stu_1_c;\n};\n\nstruct stu_2 {\n    struct stu_1 stu_2_a;\n    int b;\n};<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7ed3\u6784\u4f53\u540d\u7684\u957f\u5ea6\u6765\u5f3a\u884c\u622a\u53d6\u5185\u5b58\uff0c\u8fd9\u6837\u5c31\u80fd\u8f6c\u6362\u7ed3\u6784\u4f53\uff0c\u4ece\u800c\u5b9e\u73b0\u7c7b\u4f3c&#8221;\u7ee7\u627f&#8221;\u7684\u6548\u679c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>static inline struct stu_1 *demo(const struct stu_2 *stu)\n{\n    return (struct stu_1 *)stu;\n}<\/code><\/pre>\n\n\n\n<p>\u5b9e\u4f8b\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    struct stu_1 *a = NULL;\n    struct stu_2 *b = NULL;\n    struct stu_1 *c = NULL;\n\n    a = (struct stu_1 *)malloc(sizeof(struct stu_1));\n    snprintf(a-&gt;stu_1_a, sizeof(a-&gt;stu_1_a), \"%s\", \"absda\");\n    a-&gt;stu_1_b = 10;\n    a-&gt;stu_1_c = 3.14;\n\n    b = (struct stu_2 *)malloc(sizeof(struct stu_2));\n    b-&gt;stu_2_a = *a;\n    b-&gt;stu_2_b = 11;\n\n    c = demo(b);\n\n    free(a);\n    free(b);\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u901a\u8fc7<code>GDB<\/code>\u53ef\u4ee5\u76f4\u89c2\u7684\u770b\u5230\uff0c\u5176\u5185\u5b58\u5206\u5e03\u60c5\u51b5\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u79cd\u201c\u7ee7\u627f\u201d\u65b9\u6cd5\u83b7\u53d6\u7684\u5730\u5740\u5b9e\u9645\u4e0a\u4e5f\u662f\u6307\u5411\u4e86\u201c\u7236\u7ed3\u6784\u4f53\u201d\u7684\u5934\u90e8\uff0c\u53ea\u662f\u7ed3\u6784\u4f53\u7c7b\u578b\u4e0d\u540c\u53ef\u4ee5\u8bfb\u53d6\u5230\u7684\u5185\u5b58\u6570\u636e\u4e5f\u5c31\u4e0d\u540c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/C\u8bed\u8a00\u7ee7\u627f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1169\" height=\"626\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/C\u8bed\u8a00\u7ee7\u627f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-253\"  sizes=\"auto, (max-width: 1169px) 100vw, 1169px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u51fd\u6570\u6307\u9488<\/h2>\n\n\n\n<p>\u51fd\u6570\u6307\u9488\u662f\u4e00\u4e2a\u5728\u5b9e\u9645\u5de5\u7a0b\u8fd0\u7528\u4e2d\u975e\u5e38\u5e38\u89c1\u7684\u4e00\u79cd\u7528\u6cd5\uff0c\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027<\/p>\n\n\n\n<p><strong>\u58f0\u660e<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u51fd\u6570\u6307\u9488\u58f0\u660e\n * \u5047\u8bbe\u6709\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u63a5\u53d7\u4e24\u4e2a int \u7c7b\u578b\u7684\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a int \u7c7b\u578b\u7684\u7ed3\u679c\u3002\u8fd9\u4e2a\u548c\u51fd\u6570\u6307\u9488\u7684\u58f0\u660e\u5982\u4e0b\uff1a\n *\/\nint (*func_ptr)(int, int);\n\n\/\/ \u4f7f\u7528 typedef \u521b\u5efa\u51fd\u6570\u6307\u9488\u7c7b\u578b\ntypedef int (*func_ptr_def)(int, int);<\/code><\/pre>\n\n\n\n<p><strong>\u8d4b\u503c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int add(int a, int b)\n{\n    return a + b;\n}\n\n\/\/\u9488\u6307\u5411\u5177\u4f53\u7684\u51fd\u6570\nfunc_ptr = add;\n\n\/\/\u6216\u8005\u53ef\u4ee5\u76f4\u63a5\u5728\u51fd\u6570\u6307\u9488\u7684\u58f0\u660e\u65f6\u8fdb\u884c\u521d\u59cb\u5316\nint (*func_ptr)(int, int) = add;\n\n\/\/\u5982\u679c\u662f\u901a\u8fc7typedef\u58f0\u660e\u7684\u51fd\u6570\u6307\u9488\uff0c\u5219\u9700\u8981\u5148\u521b\u5efa\u53d8\u91cf\u518d\u8fdb\u884c\u8d4b\u503c\nfunc_ptr_def prt = add<\/code><\/pre>\n\n\n\n<p><strong>\u4f7f\u7528<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u4f7f\u7528\u89e3\u5f15\u7528\u64cd\u4f5c\u7b26 * \u548c\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570\uff1a\nint result = (*func_ptr)(3, 4);\n\n\/\/\u76f4\u63a5\u4f7f\u7528\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570\uff08\u7b80\u5199\u5f62\u5f0f\uff09\uff1a\nint result = func_ptr(3, 4);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u51fd\u6570\u6307\u9488\u6570\u7ec4<\/h2>\n\n\n\n<p><strong>\u58f0\u660e\u4e0e\u8d4b\u503c<\/strong><\/p>\n\n\n\n<p>\u51fd\u6570\u6307\u9488\u6570\u7ec4\u7684\u58f0\u660e\u4e0e\u8d4b\u503c\u4e0e\u666e\u901a\u6570\u7ec4\u5e76\u6ca1\u6709\u4ec0\u4e48\u4e0d\u540c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int add(int a, int b) {return a + b;}\nint subtract(int a, int b) {return a - b;}\nint multiply(int a, int b) {return a * b;}\n\n\/**\n * \u51fd\u6570\u6307\u9488\u6570\u7ec4\u58f0\u660e\n * \u5047\u8bbe\u51fd\u6570\u6307\u9488\u7c7b\u578b\u5982\u4e0b\uff0c\u5b83\u63a5\u53d7\u4e24\u4e2a int \u7c7b\u578b\u7684\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a int \u7c7b\u578b\u7684\u7ed3\u679c\u3002\u8fd9\u4e2a\u51fd\u6570\u6307\u9488\u6570\u7ec4\u7684\u58f0\u660e\u5982\u4e0b\uff1a\n *\/\nint (*func_ptr&#91;3])(int, int) = {add, subtract, multiply};\n\n\/\/ \u4f7f\u7528 typedef \u521b\u5efa\u51fd\u6570\u6307\u9488\u7c7b\u578b\ntypedef int (*func_ptr_def)(int, int);\nfunc_ptr_def prt&#91;3] = {add, subtract, multiply};<\/code><\/pre>\n\n\n\n<p><strong>\u4f7f\u7528<\/strong><\/p>\n\n\n\n<p>\u4e0e\u666e\u901a\u7684\u51fd\u6570\u6307\u9488\u4f7f\u7528\u4e0d\u540c\u7684\u662f\uff0c\u51fd\u6570\u6307\u9488\u6570\u7ec4\u7684\u6210\u5458\u4f7f\u7528\u65f6\u9700\u8981\u6dfb\u52a0\u6307\u5b9a\u4e0b\u6807<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int a = 10;\nint b = 2;\nint c;\n\nc = func_ptr&#91;0](a, b);\n\/\/func_ptr&#91;0]\u662fadd\u51fd\u6570\uff0cc\u7b49\u4e8e12\nc = prt&#91;2](a, b);\n\/\/prt&#91;2]\u662fmultiply\u51fd\u6570\uff0cc\u7b49\u4e8e20<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u52a8\u6001\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1a\u4e00\u7ef4\u6570\u7ec4\u540c\u6837\u53ef\u4ee5\u52a8\u6001\u5206\u914d\uff0c\u4f46\u592a\u8fc7\u57fa\u7840\uff0c\u6b64\u5904\u4e0d\u518d\u8d58\u8ff0<\/p>\n<\/blockquote>\n\n\n\n<p>\u4f7f\u7528<code>malloc<\/code>\u6765\u52a8\u6001\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4\u65f6\uff0c\u9700\u8981\u5148\u521b\u5efa\u4e00\u4e2a\u4e8c\u7ea7\u6307\u9488\uff0c\u7136\u540e\u5411\u8fd9\u4e2a\u4e8c\u7ea7\u6307\u9488\u5206\u914d\u5185\u5b58\uff0c\u6b64\u65f6\u6307\u9488\u540d\u53ef\u4ee5\u89c6\u4e3a\u6570\u7ec4\u540d\uff0c\u4e00\u7ea7\u6307\u9488\u89c6\u4e3a\u4e8c\u7ef4\u6570\u7ec4\u7684\u524d\u534a\u90e8\u5206\u4e5f\u5c31\u662f\u884c\uff0c\u901a\u8fc7\u5bf9\u4e00\u7ef4\u6570\u7ec4\u53d6\u4e0b\u6807\u5c31\u662f\u4e8c\u7ea7\u6570\u7ec4\u7684\u5217<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define numstr 3\n\nchar **str = NULL;\n\nstr = (char**)malloc(numstr * sizeof(char*));\nmemset(str, 0, sizeof(char*) * numstr);\n\nstr&#91;0] = \"qwer\";\nstr&#91;1] = \"123adaHJKLgugFLSUKJB AASFNjkbFKSBdKJbvKJDBV KJGBSJKSjbkSBJSDKJBKBJKSJKSVKJVBJKJBKDVSDKBJSDVBJKVJKBJFVJB,FZBJKBJSVDKJBASCBJKSJKBasJBKASJKBSVDJKBFBJKFBJK.FBJKSVDBKJJKXBJKDVXJKDXVJKXK.DJBVKXBVKJBKJBV.NJSDGda\";\nstr&#91;2] = \"jahdkahf\";\n\nfor (size_t i = 0; i &lt; numstr; i++) {\n    printf(\"str&#91;%d] = %s\\n\", i, str&#91;i]);\n}\nfree(str);\n\n\/**\n * \u8f93\u51fa\u7ed3\u679c\uff1a\n * str&#91;0] = qwer\n * str&#91;1] = 123adaHJKLgugFLSUKJB AASFNjkbFKSBdKJbvKJDBV KJGBSJKSjbkSBJSDKJBKBJKSJKSVKJVBJKJBKDVSDKBJSDVBJKVJKBJFVJB,FZBJKBJSVDKJBASCBJKSJKBasJBKASJKBSVDJKBFBJKFBJK.FBJKSVDBKJJKXBJKDVXJKDXVJKXK.DJBVKXBVKJBKJBV.NJSDGda\n * str&#91;2] = jahdkahf\n *\/<\/code><\/pre>\n\n\n\n<p><strong>\u5185\u5b58\u5206\u914d\u793a\u610f\u56fe<\/strong><\/p>\n\n\n\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff0c<code>malloc<\/code>\u5206\u914d\u7684\u5185\u5b58\u53ef\u4ee5\u88ab\u770b\u4f5c\u662f\u6570\u4e2a\u6307\u9488\uff0c\u5bf9\u5e94\u7740\u4e8c\u7ef4\u6570\u7ec4\u4e2d\u7684\u884c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4\u65f6\u5185\u5b58\u7ed3\u6784.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1581\" height=\"619\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4\u65f6\u5185\u5b58\u7ed3\u6784.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-255\"  sizes=\"auto, (max-width: 1581px) 100vw, 1581px\" \/><\/div><\/figure>\n\n\n\n<p><strong>\u5185\u5b58\u8fde\u7eed\u6027<\/strong><\/p>\n\n\n\n<p>\u4f7f\u7528<code>GDB<\/code>\u8c03\u8bd5\u7a0b\u5e8f\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u6837\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58\u5b9e\u9645\u4e0a\u662f\u4e00\u6bb5\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u52a8\u6001\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4GDB\u8c03\u8bd5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1256\" height=\"610\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/10\/\u52a8\u6001\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4GDB\u8c03\u8bd5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-254\"  sizes=\"auto, (max-width: 1256px) 100vw, 1256px\" \/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u7ec4\u4e0e\u6307\u9488\u5e38\u5e38\u51fa\u73b0\u8bb8\u591a\u795e\u5947\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u548c\u53ef\u80fd\u9047\u5230\u7684\u5bb9\u6613\u8e29\u5751\u7684\u70b9 \u6570\u7ec4\u540d\u662f\u4e0d\u662f\u6307\u9488 \u5728\u7533\u8bf7\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0c\u5176\u5185\u5b58\u7a7a\u95f4 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