{"id":48,"date":"2024-10-12T15:15:27","date_gmt":"2024-10-12T07:15:27","guid":{"rendered":"http:\/\/47.108.173.172\/?p=48"},"modified":"2024-11-15T16:54:29","modified_gmt":"2024-11-15T08:54:29","slug":"%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%92%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/xieg.top\/index.php\/2024\/10\/12\/%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%92%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u5b57\u7b26\u4e32\u548c\u5b57\u7b26\u4e32\u51fd\u6570"},"content":{"rendered":"\n<p>C\u8bed\u8a00\u4e2d, \u6240\u6709\u5b57\u7b26\u4e32\u51fd\u6570\u64cd\u4f5c\u7684\u5bf9\u8c61\u90fd\u662f\u6307\u9488\u6307\u5411\u7684\u5185\u5b58\u533a\u57df<\/p>\n\n\n\n<p>\u5b57\u7b26\u4e32\u662f\u4ee5<code>\\0<\/code>\u7ed3\u5c3e\u7684char\u7c7b\u578b\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char name&#91;] = {'f', 's', 's', '\\0'};\nchar name&#91;] = {'f', 's', 's'};  \/\/ \u5408\u6cd5, \u4f46\u7f3a\u5c11\u7a7a\u5b57\u7b26\u4f5c\u4e3a\u7ed3\u5c3e, \u4f1a\u5f15\u53d1\u9519\u8bef\nchar *name = \"hello world\";\nchar name&#91;] = \"hello world\";<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\u5b57\u7b26\u4e32\u7684\u8f93\u5165\u8f93\u51fa\">\u5b57\u7b26\u4e32\u7684\u8f93\u5165\u8f93\u51fa<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"puts\">puts<\/h4>\n\n\n\n<p>\u53ea\u8f93\u51fa\u5b57\u7b26\u4e32, \u5728\u9047\u5230\u7a7a\u5b57\u7b26<code>\\0<\/code>\u65f6\u505c\u6b62\u8f93\u51fa, \u5e76\u4e14\u81ea\u52a8\u8f93\u51fa\u6362\u884c\u7b26, \u53c2\u6570\u4e3a\u5b57\u7b26\u4e32\u7684\u5730\u5740<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *message = \"hello world\";  \/\/ \u5b58\u50a8\u4e3a: hello world\\0\nputs(message);  \/\/ \u81ea\u52a8\u8f93\u51fa\u6362\u884c\u7b26<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>puts(message + 5 );  \/\/ \u4ece\u7b2c6\u4e2a\u5f00\u59cb\u8f93\u51fa\nputs(&amp;message&#91;5]);  \/\/ \u4ece\u7b2c6\u4e2a\u5f00\u59cb\u8f93\u51fa<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"putchar\">putchar<\/h4>\n\n\n\n<p>\u8f93\u51fa\u5b57\u7b26, \u53c2\u6570\u4e3a\u9700\u8981\u8f93\u51fa\u7684\u5b57\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>putchar('\\n');<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"gets\">gets<\/h4>\n\n\n\n<p>\u83b7\u53d6\u7528\u6237\u7684\u8f93\u5165, \u53ef\u4ee5\u7528\u4e8e\u8bfb\u53d6\u6574\u884c\u8f93\u5165, \u5f53\u9047\u5230\u6362\u884c\u7b26\u65f6, \u505c\u6b62\u8bfb\u53d6, \u5e76\u4e14\u5c06\u6362\u884c\u7b26\u4e22\u5f03, \u5b58\u50a8\u5269\u4f59\u7684\u5b57\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *p = (char *)malloc(100 * sizeof(char));\ngets(p);\nputs(p);\n\/\/ printf(\"%s\\n\", p);<\/code><\/pre>\n\n\n\n<p>\u4f46\u662f\u4eceC11\u5f00\u59cb, \u5c31\u4ece\u6807\u51c6\u4e2d\u629b\u5f03\u4e86gets\u51fd\u6570, \u8fd9\u662f\u56e0\u4e3agets\u51fd\u6570\u4e0d\u5b89\u5168, \u5b83\u53ea\u63a5\u6536\u4e00\u4e2a\u53c2\u6570, \u4e5f\u5c31\u662f\u5b57\u7b26\u6570\u7ec4, \u6211\u4eec\u77e5\u9053, \u5f53\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u65f6, \u4f20\u9012\u7684\u662f\u6570\u7ec4\u7684\u9996\u5730\u5740, \u6240\u4ee5gets\u5e76\u4e0d\u77e5\u9053\u8be5\u6570\u7ec4\u7684\u5927\u5c0f, \u5b83\u4f1a\u5c06\u6240\u6709\u8f93\u5165\u7684\u5b57\u7b26\u90fd\u5b58\u50a8\u5230\u5730\u5740; \u8fd9\u6837\u5c31\u4f1a\u5bfc\u81f4\u6709\u53ef\u80fd\u8bbf\u95ee\u5230\u672a\u88ab\u5206\u914d\u7684\u5730\u5740, \u751a\u81f3\u662f\u5176\u4ed6\u7a0b\u5e8f\u6240\u4f7f\u7528\u7684\u5730\u5740, \u8fd9\u5c06\u5bfc\u81f4\u7a0b\u5e8f\u6bb5\u9519\u8bef<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>call to 'gets' declared with attribute warning: \nUsing gets() is always unsafe - use fgets() instead &#91;-Wattribute-warning]gcc<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"fgets\u548cfputs\">fgets\u548cfputs<\/h4>\n\n\n\n<p><code>fgets<\/code>\u53ef\u4ee5\u7528\u4e8e\u66ff\u4ee3\u4e0d\u5b89\u5168\u7684<code>gets<\/code>, \u63d0\u4f9b\u4e86\u7b2c\u4e8c\u4e2a\u53c2\u6570\u7528\u4e8e\u9650\u5236\u63a5\u6536\u7684\u6700\u5927\u5b57\u7b26\u6570\u91cf, \u7b2c\u4e09\u4e2a\u53c2\u6570\u7528\u4e8e\u8868\u793a\u5c06\u4ece\u4ec0\u4e48\u5730\u65b9\u8bfb\u5165\u6587\u4ef6<\/p>\n\n\n\n<p>\u4e0egets\u4e0d\u540c\u7684\u662f, fgets\u5e76\u4e0d\u4f1a\u4e22\u5f03\u5b57\u7b26\u4e32\u7684\u6700\u540e\u4e00\u4e2a\u6362\u884c\u7b26, \u800c\u662f\u4f1a\u5c06\u5176\u5b58\u50a8\u5728\u5b57\u7b26\u4e32\u5185, \u56e0\u6b64\u957f\u5ea6\u4e3a\u5b57\u7b26\u6570+1<\/p>\n\n\n\n<p><code>fputs<\/code>\u901a\u5e38\u548c<code>fgets<\/code>\u914d\u5957, \u63d0\u4f9b\u7b2c\u4e8c\u4e2a\u53c2\u6570\u7528\u4e8e\u8868\u793a\u5199\u5165\u6587\u4ef6\u5230\u4ec0\u4e48\u5730\u65b9, \u4e0eputs\u4e0d\u540c\u7684\u662f\u5e76\u4e0d\u4f1a\u81ea\u52a8\u8f93\u51fa\u6362\u884c\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *p = (char *)malloc(10 * sizeof(char));\nfgets(p, 10, stdin);  \/\/ stdin\u6807\u51c6\u8f93\u5165, \u4ece\u952e\u76d8\u8bfb\u53d6\u8f93\u5165\nfputs(p, stdout);  \/\/ stdout\u6807\u51c6\u8f93\u51fa, \u7528\u4e8e\u5728\u5c4f\u5e55\u4e0a\u8f93\u51fa<\/code><\/pre>\n\n\n\n<p><code>fgets<\/code>\u8fd4\u56de\u4e00\u4e2a\u6307\u5411char\u7684\u6307\u9488, \u6b63\u5e38\u60c5\u51b5\u4e0b, \u8be5\u51fd\u6570\u8fd4\u56de\u7684\u5730\u5740\u4e0e\u4f20\u5165\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u76f8\u540c, \u5982\u679c\u9047\u5230\u6587\u4ef6\u7ed3\u5c3e, \u5c06\u8fd4\u56de\u4e00\u4e2a\u7a7a\u6307\u9488<em>null pointer(NULL)<\/em><\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>while(fgets(p, 10, stdin) != NULL &amp;&amp; p&#91;0] != '\\n')\n{\n    fputs(p, stdout);\n}<\/code><\/pre>\n\n\n\n<p>fgets\u548cfputs\u591a\u7528\u4e8e\u5bf9\u6587\u4ef6\u8fdb\u884c\u64cd\u4f5c<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"gets_s\">gets_s<\/h4>\n\n\n\n<p><code>gets_s<\/code>\u662fC11\u65b0\u589e\u7684\u51fd\u6570, \u4f5c\u4e3a\u4e00\u4e2a\u53ef\u9009\u7684\u6269\u5c55, \u7f16\u8bd1\u5668\u4e0d\u4e00\u5b9a\u652f\u6301\u8be5\u51fd\u6570. \u8be5\u51fd\u6570\u540c\u6837\u53ef\u4ee5\u7528\u4e8e\u66ff\u4ee3<code>gets<\/code>, \u51fd\u6570\u63a5\u6536\u4e24\u4e2a\u53c2\u6570, \u7b2c\u4e8c\u4e2a\u53c2\u6570\u7528\u4e8e\u9650\u5236\u63a5\u6536\u7684\u6700\u5927\u5b57\u7b26\u6570\u91cf<\/p>\n\n\n\n<p>\u5f53\u9047\u5230\u6362\u884c\u7b26\u65f6, gets_s\u4f1a\u548cgets\u4e00\u6837\u5c06\u5176\u4e22\u5f03<\/p>\n\n\n\n<p>\u5982\u679c\u8bfb\u53d6\u5230\u8d85\u8fc7\u6700\u5927\u6570\u91cf\u7684\u5b57\u7b26\u65f6, \u9996\u5148\u4f1a\u5c06\u6570\u7ec4\u9996\u5b57\u7b26\u8bbe\u7f6e\u4e3a\u7a7a\u5b57\u7b26<code>\\0<\/code>, \u8bfb\u53d6\u5e76\u4e22\u5f03\u968f\u540e\u7684\u8f93\u5165, \u76f4\u5230\u8bfb\u5230\u6362\u884c\u7b26\u6216\u6587\u4ef6\u7684\u7ed3\u5c3e, \u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u7a7a\u6307\u9488. \u63a5\u7740\u8c03\u7528\u4f9d\u8d56\u5b9e\u73b0\u7684&#8221;\u5904\u7406\u51fd\u6570&#8221;, \u53ef\u80fd\u4f1a\u4e2d\u6b62\u6216\u9000\u51fa\u7a0b\u5e8f<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *p = (char *)malloc(10 * sizeof(char));\ngets_s(p, 10);<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"scanf\">scanf<\/h4>\n\n\n\n<p>\u8fd4\u56de\u6b63\u786e\u8bfb\u53d6\u53c2\u6570\u7684\u4e2a\u6570\u6216\u8005EOF(\u8bfb\u53d6\u5230\u6587\u4ef6\u7684\u7ed3\u5c3e), \u5178\u578b\u7528\u6cd5\u662f\u8bfb\u53d6\u5e76\u8f6c\u6362\u6df7\u5408\u6570\u636e\u7c7b\u578b\u4e3a\u67d0\u79cd\u6807\u51c6\u5f62\u5f0f<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\u5b57\u7b26\u4e32\u51fd\u6570\">\u5b57\u7b26\u4e32\u51fd\u6570<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"strlen\">strlen<\/h4>\n\n\n\n<p>\u5305\u542b\u5728\u5934\u6587\u4ef6<code>string.h<\/code>\u4e2d, \u7528\u4e8e\u7edf\u8ba1\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\nprintf(\"%d\\n\", strlen(message));<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"strcat\u548cstrncat\">strcat\u548cstrncat<\/h4>\n\n\n\n<p><code>strcat<\/code>\u7528\u4e8e\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u62fc\u63a5\u5728\u4e00\u8d77, \u62fc\u63a5\u540e\u7684\u7ed3\u679c\u5c06\u8986\u76d6\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32, \u62fc\u63a5\u540e\u7684\u957f\u5ea6\u5c06\u7b49\u4e8e\u4e24\u4e2a\u5b57\u7b26\u4e32\u957f\u5ea6\u4e4b\u548c<\/p>\n\n\n\n<p>stecat\u63a5\u6536\u4e24\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u53c2\u6570, \u8fd4\u56de\u4e00\u4e2achar *\u7c7b\u578b\u7684\u503c, \u53ef\u4ee5\u76f4\u63a5\u7528\u4e8e\u8f93\u51fa<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>#include &lt;string.h&gt;\n\nchar *p1 = (char *)malloc(10 *sizeof(char));\nchar *p2 = (char *)malloc(10 *sizeof(char));\n\nfgets(p1, 10, stdin);  \/\/ \u4f7f\u7528s_gets(p2, 10);\nfgets(p2, 10, stdin);  \/\/ \u4f7f\u7528s_gets(p2, 10);\n\nstrcat(p1, p2);\nfputs(p1, stdout);\n\/\/ fputs(strcat(p1, p2), stdout);<\/code><\/pre>\n\n\n\n<p>\u50cf\u4e0a\u9762\u7684\u4f8b\u5b50\u4e00\u6837, \u5982\u679c\u4f7f\u7528<code>fgets<\/code>\u6765\u83b7\u53d6\u8f93\u5165, \u90a3\u4e48\u8f93\u51fa\u62fc\u63a5\u540e\u7684\u5b57\u7b26\u4e32\u5c06\u4ecd\u7136\u7b49\u4e8ep1\u7684\u503c, \u56e0\u4e3afgets\u4f1a\u5728\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u540e\u9762\u4fdd\u7559\u6362\u884c\u7b26<code>\\n<\/code>, \u6240\u4ee5fputs\u8f93\u51fa\u65f6, \u53ea\u4f1a\u8f93\u51fa\u6362\u884c\u7b26\u4e4b\u524d\u7684\u503c, \u4e5f\u5c31\u662fp1\u7684\u503c; \u6240\u4ee5\u9700\u8981\u5728\u62fc\u63a5\u5b57\u7b26\u4e32\u65f6, \u4fdd\u8bc1\u5b57\u7b26\u4e32\u4e2d\u95f4\u6ca1\u6709\u6362\u884c\u7b26<code>\\n<\/code>, \u4f7f\u7528\u4e0b\u9762\u8fd9\u4e2a\u51fd\u6570\u6765\u5c06\u6362\u884c\u7b26\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26<code>\\0<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *s_gets(char *str, int size)\n{\n    char *ret_val;\n    int i = 0;\n\n    ret_val = fgets(str, size, stdin);\n    if(ret_val)\n    {\n        while(str&#91;i] != '\\n' &amp;&amp; str&#91;i] != '\\0')\n        {\n            i++;\n        }\n        if(str&#91;i] == '\\n')\n        {\n            str&#91;i] = '\\0';\n        }\n        else  \/\/ \u6ca1\u6709\u627e\u5230\u6362\u884c\u7b26, \u8868\u793a\u8f93\u5165\u5b57\u7b26\u8d85\u8fc7\u4e86\u7f13\u51b2\u533a\u5927\u5c0f\n        {\n            \/\/ \u4e22\u5f03\u7f13\u51b2\u533a\u5185\u5269\u4f59\u7684\u5b57\u7b26\n            while(getchar() != '\\n')\n                continue;\n        }\n    }\n    return ret_val;\n}<\/code><\/pre>\n\n\n\n<p><code>strncat<\/code>\u7528\u4e8e\u62fc\u63a5\u4e24\u4e2a\u5b57\u7b26\u4e32, \u63a5\u53d7\u4e09\u4e2a\u51fd\u6570, \u7b2c\u4e09\u4e2a\u51fd\u6570\u7528\u4e8e\u6307\u5b9a\u6700\u5927\u6dfb\u52a0\u7684\u5b57\u7b26\u6570, \u8868\u793a\u4ece\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32\u9009\u53d6\u524d\u51e0\u4e2a\u5b57\u7b26\u62fc\u63a5\u5230\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u672b\u5c3e<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>strncat(p1, p2, 4);<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"strcmp\u548cstrncmp\">strcmp\u548cstrncmp<\/h4>\n\n\n\n<p><code>strcmp<\/code>\u7528\u4e8e\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u6bd4\u8f83, \u63a5\u53d7\u4e24\u4e2a\u53c2\u6570, \u8868\u793a\u4e24\u4e2a\u9700\u8981\u8fdb\u884c\u6bd4\u8f83\u7684\u5b57\u7b26\u4e32; \u5982\u679c\u76f8\u540c, \u8fd4\u56de<code>0<\/code>, \u5982\u679c\u4e0d\u540c, \u5219\u8fd4\u56de\u975e<code>0<\/code><\/p>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f, strcmp\u6bd4\u8f83\u7684\u662f\u5b57\u7b26\u4e32, \u800c\u4e0d\u662f\u6570\u7ec4, \u6240\u4ee5\u53ef\u4ee5\u7528\u5176\u6765\u6bd4\u8f83\u5b58\u50a8\u5728\u4e0d\u540c\u5927\u5c0f\u6570\u7ec4\u4e2d\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>fgets(p1, 10);\nfgets(p2, 10);\nprintf(\"%d\\n\", strcmp(p1, p2));<\/code><\/pre>\n\n\n\n<p><code>strncmp<\/code>\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u524dn\u4e2a\u5b57\u7b26, \u63a5\u53d7\u4e09\u4e2a\u53c2\u6570, \u7b2c\u4e09\u4e2a\u53c2\u6570\u8868\u793a\u8981\u6bd4\u8f83\u524d\u51e0\u4e2a\u53c2\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>strncmp(p1, p2, 4);<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"strcpy\u548cstrncpy\">strcpy\u548cstrncpy<\/h4>\n\n\n\n<p><code>strcpy<\/code>\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u62f7\u8d1d\u5230\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32, \u5176\u8fd4\u56de\u503c\u7c7b\u578b\u4e3achar *, \u5373\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u5730\u5740<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>strcpy(p1, p2);  \/\/ \u5c06p2\u62f7\u8d1d\u81f3p1\u6307\u5411\u7684\u5730\u5740\nstrcpy(p1 + 3, p2);<\/code><\/pre>\n\n\n\n<p><code>strncpy<\/code>\u53ef\u4ee5\u6307\u5b9a\u6700\u5927\u62f7\u8d1d\u591a\u5c11\u4e2a\u5b57\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>strcpy(p1, p2, 5);<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"sprintf\">sprintf<\/h4>\n\n\n\n<p>\u51fd\u6570\u5305\u542b\u5728\u5934\u6587\u4ef6<code>stdio.h<\/code>\u5185, \u7528\u4e8e\u628a\u6570\u636e\u5199\u5165\u5b57\u7b26\u4e32, \u53ef\u4ee5\u628a\u591a\u4e2a\u5143\u7d20\u7ec4\u5408\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32; \u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u5730\u5740, \u5176\u4f59\u7684\u53c2\u6570\u4e0e<code>printf<\/code>\u76f8\u540c<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>char *formal = (char *)malloc(sizeof(10 * sizeof(char)));\nchar *message1 = \"hello\";\nchar *message2 = \"world\";\nsprintf(formal, \"%s, %s !\", message1, message2);\nfputs(formal, stdout);<\/code><\/pre>\n\n\n\n<p>\u5176\u4ed6\u5b57\u7b26\u4e32\u51fd\u6570\u8fd8\u6709<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"border-width:1px;border-radius:10px;padding-top:var(--wp--preset--spacing--10);padding-right:var(--wp--preset--spacing--10);padding-bottom:var(--wp--preset--spacing--10);padding-left:var(--wp--preset--spacing--10)\"><code>strchar(const char *p, int c);  \/\/ p\u4e2d\u662f\u5426\u542b\u6709c\u5b57\u7b26, \u8fd4\u56dep, \u5426\u5219NULL\nstrpbrk(const char *p1, const char p2);  \/\/ p1\u5305\u542bp2\u4e2d\u4efb\u4f55\u5b57\u7b26, \u8fd4\u56dep1, \u5426\u5219NULL\nstrrchr(const char *s, int c);  \/\/ s\u4e2d\u5b57\u7b26c\u6700\u540e\u51fa\u73b0\u7684\u4f4d\u7f6e\nstrstr(const char *p1, const char *p2);  \/\/ p1\u4e2d, p2\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u8bed\u8a00\u4e2d, \u6240\u6709\u5b57\u7b26\u4e32\u51fd\u6570\u64cd\u4f5c\u7684\u5bf9\u8c61\u90fd\u662f\u6307\u9488\u6307\u5411\u7684\u5185\u5b58\u533a\u57df \u5b57\u7b26\u4e32\u662f\u4ee5\\0\u7ed3\u5c3e\u7684char\u7c7b\u578b\u6570\u7ec4 \u5b57\u7b26\u4e32\u7684\u8f93\u5165 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-48","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/comments?post=48"}],"version-history":[{"count":2,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":51,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/posts\/48\/revisions\/51"}],"wp:attachment":[{"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xieg.top\/index.php\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}