{"id":787,"date":"2024-11-07T10:10:07","date_gmt":"2024-11-07T02:10:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/787\/"},"modified":"2024-11-07T10:10:07","modified_gmt":"2024-11-07T02:10:07","slug":"c%e8%af%ad%e8%a8%80%e5%a4%84%e7%90%86%e6%96%87%e4%bb%b6%e6%97%b6%e7%9a%84%e7%96%91%e9%9a%be%e8%a7%a3%e7%ad%94%e9%94%a6%e5%9b%8a","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/787\/","title":{"rendered":"C\u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1117\" src=\"https:\/\/fwq.ai\/blog\/wp-content\/uploads\/2024\/11\/172898118342839.jpg\" width=\"720\" height=\"288\" srcset=\"https:\/\/fwq.ai\/blog\/wp-content\/uploads\/2024\/11\/172898118342839.jpg 720w, https:\/\/fwq.ai\/blog\/wp-content\/uploads\/2024\/11\/172898118342839-300x120.jpg 300w, https:\/\/fwq.ai\/blog\/wp-content\/uploads\/2024\/11\/172898118342839-670x268.jpg 670w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" title=\"C\u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca\u63d2\u56fe\" alt=\"C\u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca\u63d2\u56fe\" \/><\/p>\n<p><strong>C \u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca<\/strong><\/p>\n<p>\u5728 C \u8bed\u8a00\u4e2d\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u95ee\u9898\uff0c\u4ee5\u4e0b\u662f\u5e38\u89c1\u95ee\u9898\u53ca\u5bf9\u5e94\u7684\u89e3\u51b3\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u95ee\u9898 1\uff1a\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6<\/strong><\/p>\n<p><strong>\u4ee3\u7801\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b<\/p>\n<pre>FILE *fp = fopen(\"myfile.txt\", \"r\");\nif (fp == NULL) {\n  \/\/ \u6587\u4ef6\u6253\u5f00\u5931\u8d25\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u539f\u56e0\uff1a<\/strong><\/p>\n<ul>\n<li>\u6587\u4ef6\u8def\u5f84\u9519\u8bef<\/li>\n<li>\u6587\u4ef6\u4e0d\u5b58\u5728<\/li>\n<li>\u6ca1\u6709\u6587\u4ef6\u7684\u8bfb\u53d6\u6743\u9650<\/li>\n<\/ul>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/strong><\/p>\n<ul>\n<li>\u68c0\u67e5\u6587\u4ef6\u8def\u5f84<\/li>\n<li>\u786e\u4fdd\u6587\u4ef6\u5b58\u5728<\/li>\n<li>\u68c0\u67e5\u6587\u4ef6\u6743\u9650<\/li>\n<\/ul>\n<p><strong>\u95ee\u9898 2\uff1a\u6587\u4ef6\u8bfb\u53d6\u5931\u8d25<\/strong><\/p>\n<p><strong>\u4ee3\u7801\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b<\/p>\n<pre>char buffer[100];\nsize_t read_bytes = fread(buffer, 1, sizeof(buffer), fp);\nif (read_bytes == 0) {\n  \/\/ \u6587\u4ef6\u8bfb\u53d6\u5931\u8d25\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u539f\u56e0\uff1a<\/strong><\/p>\n<ul>\n<li>\u6587\u4ef6\u5df2\u5230\u8fbe\u672b\u5c3e<\/li>\n<li>\u6587\u4ef6\u635f\u574f<\/li>\n<li>\u8bfb\u53d6\u6743\u9650\u4e0d\u8db3<\/li>\n<\/ul>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/strong><\/p>\n<ul>\n<li>\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u5df2\u5230\u8fbe\u672b\u5c3e<\/li>\n<li>\u5c1d\u8bd5\u4f7f\u7528\u5176\u4ed6\u6587\u4ef6\u8bfb\u53d6\u65b9\u6cd5<\/li>\n<li>\u68c0\u67e5\u6587\u4ef6\u6743\u9650<\/li>\n<\/ul>\n<p><strong>\u95ee\u9898 3\uff1a\u6587\u4ef6\u5199\u5165\u5931\u8d25<\/strong><\/p>\n<p><strong>\u4ee3\u7801\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b<\/p>\n<pre>char data[] = \"Hello, world!\";\nsize_t written_bytes = fwrite(data, 1, strlen(data), fp);\nif (written_bytes != strlen(data)) {\n  \/\/ \u6587\u4ef6\u5199\u5165\u5931\u8d25\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u539f\u56e0\uff1a<\/strong><\/p>\n<ul>\n<li>\u78c1\u76d8\u5df2\u6ee1<\/li>\n<li>\u6587\u4ef6\u6743\u9650\u4e0d\u8db3<\/li>\n<li>\u6587\u4ef6\u635f\u574f<\/li>\n<\/ul>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/strong><\/p>\n<ul>\n<li>\u68c0\u67e5\u78c1\u76d8\u662f\u5426\u5df2\u6ee1<\/li>\n<li>\u786e\u4fdd\u62e5\u6709\u6587\u4ef6\u7684\u5199\u5165\u6743\u9650<\/li>\n<li>\u5c1d\u8bd5\u4f7f\u7528\u5176\u4ed6\u6587\u4ef6\u5199\u5165\u65b9\u6cd5<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u4f7f\u7528 C \u8bed\u8a00\u5c06\u6587\u4ef6\u5185\u5bb9\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6587\u4ef6\uff1a<\/p>\n<pre>#include &lt;stdio.h&gt;\n\nint main() {\n  FILE *src_fp = fopen(\"source.txt\", \"r\");\n  FILE *dest_fp = fopen(\"destination.txt\", \"w\");\n\n  char buffer[100];\n  while (!feof(src_fp)) {\n    size_t read_bytes = fread(buffer, 1, sizeof(buffer), src_fp);\n    fwrite(buffer, 1, read_bytes, dest_fp);\n  }\n\n  fclose(src_fp);\n  fclose(dest_fp);\n\n  return 0;\n}&lt;\/stdio.h&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u7591\u96be\u89e3\u7b54\u63d0\u793a\uff0c\u60a8\u53ef\u4ee5\u89e3\u51b3\u5728\u5904\u7406 C \u8bed\u8a00\u6587\u4ef6\u65f6\u9047\u5230\u7684\u5e38\u89c1\u95ee\u9898\uff0c\u5e76\u7f16\u5199\u5065\u58ee\u4e14\u53ef\u9760\u7684\u6587\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fC\u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C \u8bed\u8a00\u5904\u7406\u6587\u4ef6\u65f6\u7684\u7591\u96be\u89e3\u7b54\u9526\u56ca \u5728 C \u8bed\u8a00\u4e2d\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u95ee\u9898\uff0c\u4ee5\u4e0b\u662f\u5e38\u89c1\u95ee\u9898\u53ca\u5bf9\u5e94\u7684\u89e3\u51b3\u65b9\u6cd5\uff1a \u95ee\u9898 1\uff1a\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 \u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b FILE *fp = fopen(&#8220;myfile.txt&#8221;, &#8220;r&#8221;); if (fp == NULL) { \/\/ \u6587\u4ef6\u6253\u5f00\u5931\u8d25 } \u767b\u5f55\u540e\u590d\u5236 \u539f\u56e0\uff1a \u6587\u4ef6\u8def\u5f84\u9519\u8bef \u6587\u4ef6\u4e0d\u5b58\u5728 \u6ca1\u6709\u6587\u4ef6\u7684\u8bfb\u53d6\u6743\u9650 \u89e3\u51b3\u65b9\u6cd5\uff1a \u68c0\u67e5\u6587\u4ef6\u8def\u5f84 \u786e\u4fdd\u6587\u4ef6\u5b58\u5728 \u68c0\u67e5\u6587\u4ef6\u6743\u9650 \u95ee\u9898 2\uff1a\u6587\u4ef6\u8bfb\u53d6\u5931\u8d25 \u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b char buffer[100]; size_t read_bytes = fread(buffer, 1, sizeof(buffer), fp); if (read_bytes == 0) { \/\/ \u6587\u4ef6\u8bfb\u53d6\u5931\u8d25 } \u767b\u5f55\u540e\u590d\u5236 \u539f\u56e0\uff1a \u6587\u4ef6\u5df2\u5230\u8fbe\u672b\u5c3e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-787","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=787"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/787\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}