{"id":60127,"date":"2024-10-13T00:16:15","date_gmt":"2024-10-12T16:16:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60127\/"},"modified":"2024-10-13T00:16:15","modified_gmt":"2024-10-12T16:16:15","slug":"c%e8%aa%9e%e8%a8%80%e5%85%a7%e7%bd%ae%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e8%bc%95%e9%ac%86%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e6%8c%87%e5%8d%97-c%e5%85%a7%e7%bd%ae%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60127\/","title":{"rendered":"C\u8a9e\u8a00\u5167\u7f6e\u6578\u64da\u5eab\uff1a\u8f15\u9b06\u4fee\u6539\u6578\u64da\u6307\u5357 (c\u5167\u7f6e\u6578\u64da\u5eab\u600e\u9ebc\u4fee\u6539\u6578\u64da)"},"content":{"rendered":"<h1 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id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%96%87%e4%bb%b6%e4%bd%9c%e7%82%ba%e6%95%b8%e6%93%9a%e5%ba%ab-qutDfdYvWR\">\u793a\u4f8b\uff1a\u4f7f\u7528\u6587\u4ef6\u4f5c\u70ba\u6578\u64da\u5eab<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u6587\u672c\u6587\u4ef6\u4f5c\u70ba\u6578\u64da\u5eab\uff0c\u4e26\u4fee\u6539\u5176\u4e2d\u7684\u6578\u64da\u3002<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;string.h&gt;\n\n#define MAX_LINE_LENGTH 100\n\nvoid modify_data(const char *filename, const char *old_data, const char *new_data) {\n    FILE *file = fopen(filename, \"r\");\n    if (file == NULL) {\n        perror(\"\u7121\u6cd5\u6253\u958b\u6587\u4ef6\");\n        return;\n    }\n\n    \/\/ \u5275\u5efa\u4e00\u500b\u81e8\u6642\u6587\u4ef6\n    FILE *temp_file = fopen(\"temp.txt\", \"w\");\n    if (temp_file == NULL) {\n        perror(\"\u7121\u6cd5\u5275\u5efa\u81e8\u6642\u6587\u4ef6\");\n        fclose(file);\n        return;\n    }\n\n    char line[MAX_LINE_LENGTH];\n    while (fgets(line, sizeof(line), file)) {\n        \/\/ \u66ff\u63db\u820a\u6578\u64da\u70ba\u65b0\u6578\u64da\n        if (strstr(line, old_data) != NULL) {\n            str_replace(line, old_data, new_data);\n        }\n        fputs(line, temp_file);\n    }\n\n    fclose(file);\n    fclose(temp_file);\n\n    \/\/ \u66ff\u63db\u539f\u6587\u4ef6\n    remove(filename);\n    rename(\"temp.txt\", filename);\n}\n\nvoid str_replace(char *str, const char *old, const char *new) {\n    char buffer[MAX_LINE_LENGTH];\n    char *pos;\n\n    \/\/ \u5c0b\u627e\u820a\u5b57\u7b26\u4e32\n    while ((pos = strstr(str, old)) != NULL) {\n        \/\/ \u8907\u88fd\u5230\u7de9\u885d\u5340\n        strncpy(buffer, str, pos - str);\n        buffer[pos - str] = '';\n        sprintf(buffer + (pos - str), \"%s%s\", new, pos + strlen(old));\n        strcpy(str, buffer);\n    }\n}\n\nint main() {\n    modify_data(\"data.txt\", \"\u820a\u6578\u64da\", \"\u65b0\u6578\u64da\");\n    return 0;\n}\n<\/code><\/pre>\n<h2 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