{"id":60147,"date":"2024-10-13T00:26:24","date_gmt":"2024-10-12T16:26:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60147\/"},"modified":"2024-10-13T00:26:24","modified_gmt":"2024-10-12T16:26:24","slug":"c%e8%aa%9e%e8%a8%80%e5%af%a6%e7%8f%be%ef%bc%9a%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%96%87%e4%bb%b6%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a-c%e4%bf%ae%e6%94%b9%e6%96%87%e4%bb%b6%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60147\/","title":{"rendered":"C\u8a9e\u8a00\u5be6\u73fe\uff1a\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da (c\u4fee\u6539\u6587\u4ef6\u4e2d\u7684\u6578\u64da\u5eab\u6587\u4ef6)"},"content":{"rendered":"<h1 id=\"c%e8%aa%9e%e8%a8%80%e5%af%a6%e7%8f%be%ef%bc%9a%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%96%87%e4%bb%b6%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a-rBBINqpMWl\">C\u8a9e\u8a00\u5be6\u73fe\uff1a\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u7cfb\u7d71\uff0c\u6578\u64da\u5eab\u90fd\u626e\u6f14\u8457\u95dc\u9375\u89d2\u8272\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u4f86\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%96%87%e4%bb%b6%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-rBBINqpMWl\">\u6578\u64da\u5eab\u6587\u4ef6\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u6587\u4ef6\u901a\u5e38\u662f\u4ee5\u7279\u5b9a\u683c\u5f0f\u5b58\u5132\u7684\u6578\u64da\u96c6\u5408\u3002\u9019\u4e9b\u6587\u4ef6\u53ef\u4ee5\u662f\u6587\u672c\u6587\u4ef6\u3001\u4e8c\u9032\u5236\u6587\u4ef6\u6216\u5176\u4ed6\u683c\u5f0f\u3002\u5c0d\u65bcC\u8a9e\u8a00\u4f86\u8aaa\uff0c\u6700\u5e38\u898b\u7684\u6578\u64da\u5eab\u6587\u4ef6\u683c\u5f0f\u662f\u6587\u672c\u6587\u4ef6\uff0c\u56e0\u70ba\u5b83\u5011\u6613\u65bc\u8b80\u53d6\u548c\u7de8\u8f2f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8c%e8%aa%9e%e8%a8%80%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%96%87%e4%bb%b6%e7%9a%84%e6%ad%a5%e9%a9%9f-rBBINqpMWl\">\u4f7f\u7528C\u8a9e\u8a00\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u7684\u6b65\u9a5f<\/h2>\n<p>\u5728C\u8a9e\u8a00\u4e2d\uff0c\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u6253\u958b\u6587\u4ef6<\/li>\n<li>\u8b80\u53d6\u6587\u4ef6\u5167\u5bb9<\/li>\n<li>\u4fee\u6539\u6240\u9700\u7684\u6578\u64da<\/li>\n<li>\u5beb\u56de\u6587\u4ef6<\/li>\n<li>\u95dc\u9589\u6587\u4ef6<\/li>\n<\/ul>\n<h3 id=\"1-%e6%89%93%e9%96%8b%e6%96%87%e4%bb%b6-rBBINqpMWl\">1. \u6253\u958b\u6587\u4ef6<\/h3>\n<p>\u4f7f\u7528\u6a19\u6e96\u7684C\u8a9e\u8a00\u51fd\u6578\u4f86\u6253\u958b\u6587\u4ef6\u3002\u53ef\u4ee5\u4f7f\u7528 <code>fopen<\/code> \u51fd\u6578\u4f86\u6253\u958b\u6587\u4ef6\uff0c\u4e26\u6307\u5b9a\u6a21\u5f0f\uff08\u4f8b\u5982\u8b80\u53d6\u6216\u5beb\u5165\uff09\u3002<\/p>\n<pre><code>\nFILE *file;\nfile = fopen(\"database.txt\", \"r+\"); \/\/ \u4ee5\u8b80\u5beb\u6a21\u5f0f\u6253\u958b\u6587\u4ef6\nif (file == NULL) {\n    perror(\"Error opening file\");\n    return -1;\n}\n<\/code><\/pre>\n<h3 id=\"2-%e8%ae%80%e5%8f%96%e6%96%87%e4%bb%b6%e5%85%a7%e5%ae%b9-rBBINqpMWl\">2. \u8b80\u53d6\u6587\u4ef6\u5167\u5bb9<\/h3>\n<p>\u5728\u6253\u958b\u6587\u4ef6\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>fgets<\/code> \u6216 <code>fscanf<\/code> \u7b49\u51fd\u6578\u4f86\u8b80\u53d6\u6587\u4ef6\u5167\u5bb9\u3002\u9019\u88e1\u6211\u5011\u5c07\u4f7f\u7528 <code>fgets<\/code> \u4f86\u9010\u884c\u8b80\u53d6\u6578\u64da\u3002<\/p>\n<pre><code>\nchar line[256];\nwhile (fgets(line, sizeof(line), file)) {\n    \/\/ \u8655\u7406\u6bcf\u4e00\u884c\u6578\u64da\n}\n<\/code><\/pre>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e6%89%80%e9%9c%80%e7%9a%84%e6%95%b8%e6%93%9a-rBBINqpMWl\">3. \u4fee\u6539\u6240\u9700\u7684\u6578\u64da<\/h3>\n<p>\u5728\u8b80\u53d6\u6578\u64da\u5f8c\uff0c\u53ef\u4ee5\u6839\u64da\u9700\u8981\u9032\u884c\u4fee\u6539\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u8981\u5c07\u67d0\u4e00\u884c\u4e2d\u7684\u7279\u5b9a\u503c\u66ff\u63db\u70ba\u65b0\u503c\u3002<\/p>\n<pre><code>\nif (strstr(line, \"old_value\")) {\n    strcpy(line, \"new_value\");\n}\n<\/code><\/pre>\n<h3 id=\"4-%e5%af%ab%e5%9b%9e%e6%96%87%e4%bb%b6-rBBINqpMWl\">4. \u5beb\u56de\u6587\u4ef6<\/h3>\n<p>\u5728\u4fee\u6539\u6578\u64da\u5f8c\uff0c\u9700\u8981\u5c07\u66f4\u65b0\u7684\u5167\u5bb9\u5beb\u56de\u6587\u4ef6\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5c07\u6587\u4ef6\u6307\u91dd\u79fb\u52d5\u5230\u6587\u4ef6\u7684\u958b\u982d\u4f86\u5be6\u73fe\uff0c\u7136\u5f8c\u4f7f\u7528 <code>fputs<\/code> \u6216 <code>fprintf<\/code> \u51fd\u6578\u5beb\u5165\u6578\u64da\u3002<\/p>\n<pre><code>\nfseek(file, 0, SEEK_SET); \/\/ \u79fb\u52d5\u5230\u6587\u4ef6\u958b\u982d\nfputs(line, file); \/\/ \u5beb\u5165\u4fee\u6539\u5f8c\u7684\u6578\u64da\n<\/code><\/pre>\n<h3 id=\"5-%e9%97%9c%e9%96%89%e6%96%87%e4%bb%b6-rBBINqpMWl\">5. \u95dc\u9589\u6587\u4ef6<\/h3>\n<p>\u6700\u5f8c\uff0c\u4f7f\u7528 <code>fclose<\/code> \u51fd\u6578\u95dc\u9589\u6587\u4ef6\uff0c\u4ee5\u91cb\u653e\u8cc7\u6e90\u3002<\/p>\n<pre><code>\nfclose(file);\n<\/code><\/pre>\n<h2 id=\"%e5%ae%8c%e6%95%b4%e7%a4%ba%e4%be%8b-rBBINqpMWl\">\u5b8c\u6574\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5b8c\u6574\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u4f86\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\nint main() {\n    FILE *file;\n    char line[256];\n\n    file = fopen(\"database.txt\", \"r+\");\n    if (file == NULL) {\n        perror(\"Error opening file\");\n        return -1;\n    }\n\n    while (fgets(line, sizeof(line), file)) {\n        if (strstr(line, \"old_value\")) {\n            strcpy(line, \"new_valuen\");\n        }\n    }\n\n    fseek(file, 0, SEEK_SET);\n    fputs(line, file);\n    fclose(file);\n\n    return 0;\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-rBBINqpMWl\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528C\u8a9e\u8a00\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u53ea\u9700\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\u5373\u53ef\u3002\u901a\u904e\u6b63\u78ba\u7684\u6587\u4ef6\u64cd\u4f5c\u548c\u5b57\u7b26\u4e32\u8655\u7406\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u4fe1\u606f\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u8a31\u591a\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u5be6\u7528\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u76f4\u63a5\u64cd\u4f5c\u6587\u4ef6\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u96f2\u74b0\u5883\u4e2d\u904b\u884c\u9019\u4e9b\u61c9\u7528\u7a0b\u5e8f\u611f\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u4fee\u6539\u6578\u64da\u5eab\u6587\u4ef6\u4e2d\u7684\u6578\u64da\uff0c\u638c\u63e1\u6587\u4ef6\u64cd\u4f5c\u8207\u6578\u64da\u8655\u7406\u7684\u6280\u5de7\uff0c\u63d0\u5347\u7de8\u7a0b\u80fd\u529b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60147","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60147"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60147\/revisions"}],"predecessor-version":[{"id":60148,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60147\/revisions\/60148"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}