{"id":68751,"date":"2025-06-04T10:09:52","date_gmt":"2025-06-04T02:09:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=68751"},"modified":"2025-06-04T11:54:04","modified_gmt":"2025-06-04T03:54:04","slug":"%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90-c-%e8%af%ad%e8%a8%80%e6%95%b0%e7%bb%84%e4%bc%a0%e5%8f%82%ef%bc%9a%e8%a7%84%e5%88%99%e4%b8%8e%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/68751\/","title":{"rendered":"\u6df1\u5ea6\u89e3\u6790 C \u8bed\u8a00\u6570\u7ec4\u4f20\u53c2\uff1a\u89c4\u5219\u4e0e\u793a\u4f8b"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728 C \u8bed\u8a00\u5f00\u53d1\u4e2d\uff0c\u6570\u7ec4\u662f\u6700\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002\u5c06\u6570\u7ec4\u4f5c\u4e3a\u51fd\u6570\u53c2\u6570\u4f20\u9012\u65f6\u4e0e\u4f20\u9012\u666e\u901a\u53d8\u91cf\u6709\u6240\u4e0d\u540c\uff0c\u638c\u63e1\u5176\u4e2d\u7684\u7ec6\u8282\u6709\u52a9\u4e8e\u5f00\u53d1\u4eba\u5458\u7f16\u5199\u66f4\u9ad8\u6548\u3001\u53ef\u9760\u7684\u4ee3\u7801\u3002\u672c\u6587\u5c06\u7cfb\u7edf\u4ecb\u7ecd\u6570\u7ec4\u4f20\u53c2\u7684\u51e0\u79cd\u5e38\u89c1\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879\uff0c\u5e76\u901a\u8fc7\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u4e00\u7ef4\u548c\u4e8c\u7ef4\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u3002\u540c\u65f6\uff0c\u6211\u4eec\u8fd8\u5c06\u7ed3\u5408\u5b9e\u9645\u9700\u6c42\uff0c\u4ecb\u7ecd\u5982\u4f55\u5728\u4e91\u7aef\u73af\u5883\uff08\u5982<strong>\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\uff09\u4e0b\u8fdb\u884c\u9ad8\u6548\u7f16\u8bd1\u4e0e\u90e8\u7f72\uff0c\u4f18\u5316\u8de8\u5883\u8bbf\u95ee\u6027\u80fd\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001\u6570\u7ec4\u4f20\u53c2\u57fa\u7840<\/h2>\n<p>\u5f53\u5c06\u6570\u7ec4\u4f20\u9012\u7ed9\u51fd\u6570\u65f6\uff0c\u5b9e\u9645\u4e0a\u4f20\u9012\u7684\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740\uff0c\u5e76\u4e0d\u4f1a\u5728\u51fd\u6570\u5185\u90e8\u521b\u5efa\u65b0\u7684\u6570\u7ec4\u526f\u672c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f62\u53c2\u4e0e\u5b9e\u53c2\u5171\u4eab\u540c\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\uff0c\u56e0\u6b64\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u6570\u7ec4\u5143\u7d20\u7684\u4fee\u6539\u4f1a\u5f71\u54cd\u5230\u5916\u90e8\u6570\u7ec4\u3002<\/p>\n<h3>1. \u6570\u7ec4\u540d\u7684\u542b\u4e49<\/h3>\n<ul>\n<li><strong>\u4e00\u822c\u60c5\u51b5\u4e0b<\/strong>\uff0c\u6570\u7ec4\u540d\u8868\u793a\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\u3002\u4f8b\u5982\uff0c<code>arr<\/code> \u7b49\u4ef7\u4e8e <code>&amp;arr[0]<\/code>\u3002<\/li>\n<li><strong>\u7279\u6b8a\u60c5\u51b5\u4e00\uff1a<code>sizeof(arr)<\/code><\/strong>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\nint main() {\r\n    int arr[] = {1, 2, 3, 4, 5};\r\n    printf(\"%zu\\n\", sizeof(arr)); \/\/ \u8f93\u51fa\u6570\u7ec4\u603b\u5b57\u8282\u6570\uff08\u4f8b\u5982 20\uff09\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u6b64\u65f6 <code>sizeof(arr)<\/code> \u8ba1\u7b97\u7684\u662f\u6574\u4e2a\u6570\u7ec4\u5728\u5185\u5b58\u4e2d\u7684\u5b57\u8282\u5927\u5c0f\uff0c\u800c\u975e\u6307\u9488\u957f\u5ea6\u3002<\/li>\n<li><strong>\u7279\u6b8a\u60c5\u51b5\u4e8c\uff1a<code>&amp;arr<\/code><\/strong>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\nint main() {\r\n    int arr[] = {1, 2, 3, 4, 5};\r\n    printf(\"%p\\n\", (void *)arr);      \/\/ \u8f93\u51fa\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\r\n    printf(\"%p\\n\", (void *)&amp;arr);     \/\/ \u8f93\u51fa\u6570\u7ec4\u6574\u4f53\u5730\u5740\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u867d\u7136 <code>arr<\/code> \u4e0e <code>&amp;arr<\/code> \u5728\u521d\u59cb\u6253\u5370\u7ed3\u679c\u76f8\u540c\uff0c\u4f46\u5f53\u5c06\u6307\u9488\u52a0 1 \u65f6\uff0c\u5dee\u5f02\u4f1a\u4f53\u73b0\u51fa\u6765\uff1a<\/p>\n<pre><code class=\"language-c\">printf(\"%p\\n\", (void *)(arr + 1));    \/\/ \u8df3\u8fc7\u4e00\u4e2a int\uff08\u5373\u7b2c\u4e00\u4e2a\u5143\u7d20\uff09\r\nprintf(\"%p\\n\", (void *)(&amp;arr + 1));   \/\/ \u8df3\u8fc7\u6574\u4e2a\u6570\u7ec4\u957f\u5ea6\uff08\u4f8b\u5982 sizeof(int)*5\uff09\r\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e8c\u3001\u5b9e\u53c2\u4f20\u9012\u65f6\u7684\u7279\u6b8a\u573a\u666f<\/h2>\n<h3>2.1 \u4f7f\u7528 <code>sizeof(arr)<\/code> \u8ba1\u7b97\u5143\u7d20\u4e2a\u6570<\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\n\r\nint main() {\r\n    int arr[] = {10, 20, 30, 40, 50, 60};\r\n    int count = sizeof(arr) \/ sizeof(arr[0]); \/\/ \u5f97\u5230\u5143\u7d20\u4e2a\u6570 6\r\n    printf(\"\u6570\u7ec4\u5143\u7d20\u4e2a\u6570\uff1a%d\\n\", count);\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u5bf9\u4e8e\u5e0c\u671b\u5728\u51fd\u6570\u5185\u90e8\u52a8\u6001\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u573a\u666f\uff0c\u53ef\u901a\u8fc7\u4e0a\u9762\u65b9\u5f0f\u5728\u4e3b\u51fd\u6570\u4e2d\u5148\u8ba1\u7b97\uff0c\u518d\u5c06 <code>count<\/code> \u4f20\u5165\u51fd\u6570\u3002<\/p>\n<h3>2.2 \u4f7f\u7528 <code>&amp;arr<\/code> \u4e0e <code>arr<\/code> \u7684\u6307\u9488\u5dee\u5f02<\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\n\r\nint main() {\r\n    int arr[] = {1, 2, 3, 4, 5};\r\n    printf(\"arr     = %p\\n\", (void *)arr);\r\n    printf(\"&amp;arr    = %p\\n\", (void *)&amp;arr);\r\n    printf(\"arr + 1 = %p\\n\", (void *)(arr + 1));     \/\/ \u8df3\u8fc7\u4e00\u4e2a\u5143\u7d20\uff084 \u5b57\u8282\uff09\r\n    printf(\"&amp;arr+1  = %p\\n\", (void *)(&amp;arr + 1));   \/\/ \u8df3\u8fc7\u6574\u4e2a\u6570\u7ec4\uff0820 \u5b57\u8282\uff09\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u4f8b\u4e2d\uff0c<code>arr + 1<\/code> \u4f1a\u79fb\u52a8\u5230\u7b2c\u4e8c\u4e2a\u5143\u7d20\u5730\u5740\uff0c\u800c <code>&amp;arr + 1<\/code> \u4f1a\u8df3\u8fc7\u6574\u4e2a\u6570\u7ec4\u5185\u5b58\u5757\u3002<\/p>\n<hr \/>\n<h2>\u4e09\u3001\u5f62\u53c2\u7c7b\u578b\u2014\u2014\u6570\u7ec4\u540d\u63a5\u6536<\/h2>\n<h3>3.1 \u4e00\u7ef4\u6570\u7ec4\u4f5c\u4e3a\u5f62\u53c2<\/h3>\n<p>\u5f53\u51fd\u6570\u5f62\u53c2\u58f0\u660e\u4e3a <code>int arr[]<\/code> \u6216 <code>int arr[8]<\/code> \u65f6\uff0c\u5b9e\u53c2\u4f20\u5165\u7684\u662f\u9996\u5143\u7d20\u5730\u5740\uff0c\u5f62\u53c2\u5185\u90e8\u65e0\u8bba\u4f7f\u7528\u54ea\u79cd\u5199\u6cd5\uff0c\u5747\u7b49\u540c\u4e8e <code>int *arr<\/code>\u3002<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u5c06\u6570\u7ec4\u6240\u6709\u5143\u7d20\u7f6e\u4e3a -1\r\nvoid set_to_minus_one(int arr[], int sz) {\r\n    for (int i = 0; i &lt; sz; i++) {\r\n        arr[i] = -1;\r\n    }\r\n}\r\n\r\n\/\/ \u4f9d\u6b21\u6253\u5370\u6570\u7ec4\u6240\u6709\u5143\u7d20\r\nvoid print_array(int arr[], int sz) {\r\n    for (int i = 0; i &lt; sz; i++) {\r\n        printf(\"%d \", arr[i]);\r\n    }\r\n    printf(\"\\n\");\r\n}\r\n\r\nint main() {\r\n    int data[] = {0, 1, 2, 3, 4, 5, 6, 7};\r\n    int n = sizeof(data) \/ sizeof(data[0]); \/\/ \u8ba1\u7b97\u5143\u7d20\u4e2a\u6570\r\n    print_array(data, n);\r\n    set_to_minus_one(data, n);\r\n    print_array(data, n);\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u5728\u4e3b\u51fd\u6570\u4e2d\u5bf9 <code>data<\/code> \u8fdb\u884c\u4fee\u6539\u540e\uff0c<code>set_to_minus_one<\/code> \u5185\u90e8\u7684\u4fee\u6539\u4f1a\u53cd\u6620\u5230\u4e3b\u51fd\u6570\u7684 <code>data<\/code> \u6570\u7ec4\u4e0a\u3002<\/p>\n<h3>3.2 \u4e8c\u7ef4\u6570\u7ec4\u4f5c\u4e3a\u5f62\u53c2<\/h3>\n<p>\u5bf9\u4e8e\u4e8c\u7ef4\u6570\u7ec4\uff0c\u884c\u6570\u53ef\u4ee5\u7701\u7565\uff0c\u4f46\u5217\u6570\u5fc5\u987b\u663e\u5f0f\u6307\u5b9a\u4e14\u4e0d\u53ef\u7701\u7565\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u5c06\u4e8c\u7ef4\u6570\u7ec4\u6240\u6709\u5143\u7d20\u7f6e\u4e3a -1\r\nvoid set_matrix(int arr[][3], int rows) {\r\n    for (int i = 0; i &lt; rows; i++) {\r\n        for (int j = 0; j &lt; 3; j++) {\r\n            arr[i][j] = -1;\r\n        }\r\n    }\r\n}\r\n\r\n\/\/ \u6253\u5370\u4e8c\u7ef4\u6570\u7ec4\r\nvoid print_matrix(int arr[][3], int rows) {\r\n    for (int i = 0; i &lt; rows; i++) {\r\n        for (int j = 0; j &lt; 3; j++) {\r\n            printf(\"%d \", arr[i][j]);\r\n        }\r\n        printf(\"\\n\");\r\n    }\r\n    printf(\"\\n\");\r\n}\r\n\r\nint main() {\r\n    int matrix[][3] = {\r\n        {0, 1, 2},\r\n        {3, 4, 5},\r\n        {6, 7, 8}\r\n    };\r\n    int rows = sizeof(matrix) \/ sizeof(matrix[0]); \/\/ \u884c\u6570\r\n    print_matrix(matrix, rows);\r\n    set_matrix(matrix, rows);\r\n    print_matrix(matrix, rows);\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u4f8b\u4e2d\uff0c<code>arr[][3]<\/code> \u8868\u793a\u201c\u884c\u6570\u7701\u7565\u3001\u5217\u6570\u4e3a 3\u201d\uff0c\u4f20\u5165\u51fd\u6570\u65f6\uff0c\u5b9e\u53c2\u4e0e\u5f62\u53c2\u4ecd\u6307\u5411\u540c\u4e00\u5757\u5185\u5b58\u3002<\/p>\n<hr \/>\n<h2>\u56db\u3001\u5f62\u53c2\u7c7b\u578b\u2014\u2014\u6307\u9488\u63a5\u6536<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528\u6570\u7ec4\u540d\u58f0\u660e\uff0c\u5f62\u53c2\u4e5f\u53ef\u4ee5\u76f4\u63a5\u7528\u6307\u9488\u63a5\u6536\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\u3002\u5bf9\u4e8e\u4e00\u7ef4\u6570\u7ec4\uff0c\u7b49\u6548\u4e8e\u4e0a\u6587\u7684\u5199\u6cd5\uff1a<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\r\n\r\n\/\/ \u4f7f\u7528\u6307\u9488\u5c06\u6570\u7ec4\u6240\u6709\u5143\u7d20\u7f6e\u4e3a -1\r\nvoid set_to_minus_one_ptr(int *arr, int sz) {\r\n    for (int i = 0; i &lt; sz; i++) {\r\n        arr[i] = -1;\r\n    }\r\n}\r\n\r\n\/\/ \u4f9d\u6b21\u6253\u5370\u6570\u7ec4\u5143\u7d20\r\nvoid print_array_ptr(int *arr, int sz) {\r\n    for (int i = 0; i &lt; sz; i++) {\r\n        printf(\"%d \", arr[i]);\r\n    }\r\n    printf(\"\\n\");\r\n}\r\n\r\nint main() {\r\n    int data[] = {0, 1, 2, 3, 4, 5, 6, 7};\r\n    int n = sizeof(data) \/ sizeof(data[0]);\r\n    print_array_ptr(data, n);\r\n    set_to_minus_one_ptr(data, n);\r\n    print_array_ptr(data, n);\r\n    return 0;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0d\u7ba1\u662f <code>int arr[]<\/code> \u8fd8\u662f <code>int *arr<\/code>\uff0c\u6838\u5fc3\u90fd\u662f\u64cd\u4f5c\u540c\u4e00\u7247\u5185\u5b58\u533a\u57df\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u73af\u5883\u4e0b\u7684\u7f16\u8bd1\u4e0e\u90e8\u7f72\u5efa\u8bae<\/h2>\n<p>\u5bf9\u4e8e\u8ffd\u6c42\u9ad8\u6027\u80fd\u548c\u4f4e\u5ef6\u8fdf\u7684\u9879\u76ee\uff0c\u5efa\u8bae\u9009\u62e9<strong>\u7f8e\u56fdVPS<\/strong>\u6216<strong>\u7f8e\u56fd\u4e91\u670d\u52a1\u5668<\/strong>\u6765\u6258\u7ba1\u4ee3\u7801\u7f16\u8bd1\u4e0e\u8c03\u8bd5\u73af\u5883\uff1a<\/p>\n<ol>\n<li><strong>\u8de8\u5883\u8bbf\u95ee\u901f\u5ea6\u66f4\u4f18<\/strong><br \/>\n\u4e0e\u56fd\u5185\u670d\u52a1\u5668\u76f8\u6bd4\uff0c\u7f8e\u56fd\u8282\u70b9\u5bf9\u5317\u7f8e\u3001\u6b27\u6d32\u53ca\u4e9a\u592a\u90e8\u5206\u5730\u533a\u8bbf\u95ee\u5ef6\u8fdf\u66f4\u4f4e\uff0c\u5c24\u5176\u9002\u5408\u9762\u5411\u5168\u7403\u7528\u6237\u90e8\u7f72\u670d\u52a1\u3002<\/li>\n<li><strong>\u7f16\u8bd1\u94fe\u4e0e\u4f9d\u8d56\u7ba1\u7406<\/strong><br \/>\n\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u4e0a\u8fdb\u884c\u5927\u89c4\u6a21\u7f16\u8bd1\u4e0e\u6d4b\u8bd5\uff0c\u53ef\u4ee5\u5145\u5206\u5229\u7528\u5176\u7a33\u5b9a\u5e26\u5bbd\uff0c\u5feb\u901f\u4e0b\u8f7d\u5f00\u6e90\u4f9d\u8d56\u548c\u8f6f\u4ef6\u5305\u3002<br \/>\n\u793a\u4f8b\uff08\u5728 CentOS\/Ubuntu \u4e0a\u5b89\u88c5 gcc \u4e0e make\uff09\uff1a<\/p>\n<pre><code class=\"language-bash\"># Ubuntu \u7cfb\u7edf\r\nsudo apt-get update\r\nsudo apt-get install build-essential\r\n\r\n# CentOS \u7cfb\u7edf\r\nsudo yum groupinstall \"Development Tools\"\r\n<\/code><\/pre>\n<\/li>\n<li><strong>\u6301\u7eed\u96c6\u6210\u4e0e\u81ea\u52a8\u5316<\/strong><br \/>\n\u53ef\u5728\u7f8e\u56fd\u8282\u70b9\u4e0a\u914d\u7f6e Jenkins\u3001GitLab CI \u7b49\u81ea\u52a8\u5316\u6d4b\u8bd5\u548c\u90e8\u7f72\u6d41\u6c34\u7ebf\uff0c\u5c06 C \u4ee3\u7801\u7f16\u8bd1\u3001\u5355\u5143\u6d4b\u8bd5\u3001\u4ee3\u7801\u8986\u76d6\u7387\u5206\u6790\u7b49\u5168\u6d41\u7a0b\u96c6\u6210\u5728\u4e91\u7aef\u73af\u5883\u4e2d\uff0c\u5b9e\u73b0\u81ea\u52a8\u5316\u6301\u7eed\u96c6\u6210\u3002<\/li>\n<li><strong>\u6570\u636e\u5e93\u4e0e\u7f13\u5b58\u9009\u578b<\/strong><br \/>\n\u5c06 MySQL \u6216 PostgreSQL \u5b89\u88c5\u5728<strong>\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\uff0c\u5e76\u7ed3\u5408 Redis \u7f13\u5b58\uff0c\u53ef\u4e3a\u9ad8\u5e76\u53d1\u9879\u76ee\u63d0\u4f9b\u7a33\u5b9a\u5b58\u50a8\u4e0e\u5feb\u901f\u8bfb\u5199\u80fd\u529b\u3002<\/li>\n<\/ol>\n<hr \/>\n<h2>\u7ed3\u8bed<\/h2>\n<p>\u672c\u6587\u4ece\u6570\u7ec4\u4f20\u53c2\u7684\u539f\u7406\u548c\u793a\u4f8b\u51fa\u53d1\uff0c\u9010\u6b65\u6df1\u5165\u4ecb\u7ecd\u4e86\u4e00\u7ef4\u3001\u4e8c\u7ef4\u6570\u7ec4\u4ee5\u53ca\u6307\u9488\u63a5\u6536\u7684\u7528\u6cd5\uff0c\u5e2e\u52a9\u8bfb\u8005\u638c\u63e1\u5728\u51fd\u6570\u4e2d\u64cd\u4f5c\u6570\u7ec4\u7684\u6b63\u786e\u65b9\u5f0f\u3002\u540c\u65f6\uff0c\u6211\u4eec\u8fd8\u7ed3\u5408\u5b9e\u9645\u9700\u6c42\uff0c\u5206\u4eab\u4e86\u5728<strong>\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u73af\u5883\u4e0b\u90e8\u7f72 C \u8bed\u8a00\u9879\u76ee\u7684\u5b9e\u7528\u5efa\u8bae\uff0c\u5305\u62ec\u7f16\u8bd1\u73af\u5883\u914d\u7f6e\u4e0e\u6301\u7eed\u96c6\u6210\u65b9\u6848\u3002\u5982\u679c\u60a8\u8ba1\u5212\u5c06\u9879\u76ee\u90e8\u7f72\u5230\u7f8e\u4e1c\u6216\u7f8e\u897f\u8282\u70b9\uff0c\u83b7\u53d6\u66f4\u4f4e\u7f51\u7edc\u5ef6\u8fdf\u4e0e\u66f4\u7a33\u5b9a\u7684\u8fd0\u884c\u4f53\u9a8c\uff0c\u63a8\u8350\u4f7f\u7528 <a 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\u8bed\u8a00\u5f00\u53d1\u4e2d\uff0c\u6570\u7ec4\u662f\u6700\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002\u5c06\u6570\u7ec4\u4f5c\u4e3a\u51fd\u6570\u53c2\u6570\u4f20\u9012\u65f6\u4e0e\u4f20\u9012\u666e\u901a\u53d8\u91cf\u6709\u6240\u4e0d\u540c\uff0c\u638c\u63e1\u5176\u4e2d\u7684\u7ec6\u8282\u6709\u52a9\u4e8e\u5f00\u53d1\u4eba\u5458\u7f16\u5199\u66f4\u9ad8\u6548\u3001\u53ef\u9760\u7684\u4ee3\u7801\u3002\u672c\u6587\u5c06\u7cfb\u7edf\u4ecb\u7ecd\u6570\u7ec4\u4f20\u53c2\u7684\u51e0\u79cd\u5e38\u89c1\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879\uff0c\u5e76\u901a\u8fc7\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u4e00\u7ef4\u548c\u4e8c\u7ef4\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u3002\u540c\u65f6\uff0c\u6211\u4eec\u8fd8\u5c06\u7ed3\u5408\u5b9e\u9645\u9700\u6c42\uff0c\u4ecb\u7ecd\u5982\u4f55\u5728\u4e91\u7aef\u73af\u5883\uff08\u5982\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u4e0b\u8fdb\u884c\u9ad8\u6548\u7f16\u8bd1\u4e0e\u90e8\u7f72\uff0c\u4f18\u5316\u8de8\u5883\u8bbf\u95ee\u6027\u80fd\u3002 \u4e00\u3001\u6570\u7ec4\u4f20\u53c2\u57fa\u7840 \u5f53\u5c06\u6570\u7ec4\u4f20\u9012\u7ed9\u51fd\u6570\u65f6\uff0c\u5b9e\u9645\u4e0a\u4f20\u9012\u7684\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740\uff0c\u5e76\u4e0d\u4f1a\u5728\u51fd\u6570\u5185\u90e8\u521b\u5efa\u65b0\u7684\u6570\u7ec4\u526f\u672c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f62\u53c2\u4e0e\u5b9e\u53c2\u5171\u4eab\u540c\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\uff0c\u56e0\u6b64\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u6570\u7ec4\u5143\u7d20\u7684\u4fee\u6539\u4f1a\u5f71\u54cd\u5230\u5916\u90e8\u6570\u7ec4\u3002 1. \u6570\u7ec4\u540d\u7684\u542b\u4e49 \u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6570\u7ec4\u540d\u8868\u793a\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\u3002\u4f8b\u5982\uff0carr \u7b49\u4ef7\u4e8e &amp;arr[0]\u3002 \u7279\u6b8a\u60c5\u51b5\u4e00\uff1asizeof(arr) #include &lt;stdio.h&gt; int main() { int arr[] = {1, 2, 3, 4, 5}; printf(&#8220;%zu\\n&#8221;, sizeof(arr)); \/\/ \u8f93\u51fa\u6570\u7ec4\u603b\u5b57\u8282\u6570\uff08\u4f8b\u5982 20\uff09 return 0; } \u6b64\u65f6 sizeof(arr) \u8ba1\u7b97\u7684\u662f\u6574\u4e2a\u6570\u7ec4\u5728\u5185\u5b58\u4e2d\u7684\u5b57\u8282\u5927\u5c0f\uff0c\u800c\u975e\u6307\u9488\u957f\u5ea6\u3002 \u7279\u6b8a\u60c5\u51b5\u4e8c\uff1a&amp;arr #include &lt;stdio.h&gt; int main() { int arr[] = {1, 2, 3, 4, 5}; printf(&#8220;%p\\n&#8221;, (void *)arr); \/\/ \u8f93\u51fa\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740 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