{"id":166003,"date":"2024-11-05T14:55:25","date_gmt":"2024-11-05T06:55:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/166003\/"},"modified":"2024-11-05T14:55:25","modified_gmt":"2024-11-05T06:55:25","slug":"%e5%bf%ab%e9%80%9f%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%ef%bc%9a%e4%bd%bf%e7%94%a8c%e8%aa%9e%e8%a8%80%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%e5%ba%ab-c-%e7%8d%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/166003\/","title":{"rendered":"\u5feb\u901f\u7372\u53d6\u5929\u6c23\u6578\u64da\uff1a\u4f7f\u7528C\u8a9e\u8a00\u7372\u53d6\u5929\u6c23\u6578\u64da\u5eab (c \u7372\u53d6\u5929\u6c23\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%ef%bc%9a%e4%bd%bf%e7%94%a8c%e8%aa%9e%e8%a8%80%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%e5%ba%ab-gDIpyXLiTn\">\u5feb\u901f\u7372\u53d6\u5929\u6c23\u6578\u64da\uff1a\u4f7f\u7528C\u8a9e\u8a00\u7372\u53d6\u5929\u6c23\u6578\u64da\u5eab<\/h1>\n<p>\u96a8\u8457\u79d1\u6280\u7684\u9032\u6b65\uff0c\u5929\u6c23\u6578\u64da\u7684\u7372\u53d6\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u7c21\u55ae\u3002\u7121\u8ad6\u662f\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u7372\u53d6\u6e96\u78ba\u7684\u5929\u6c23\u6578\u64da\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u4f86\u5feb\u901f\u7372\u53d6\u5929\u6c23\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%81%b8%e6%93%87c%e8%aa%9e%e8%a8%80%ef%bc%9f-gDIpyXLiTn\">\u70ba\u4ec0\u9ebc\u9078\u64c7C\u8a9e\u8a00\uff1f<\/h2>\n<p>C\u8a9e\u8a00\u662f\u4e00\u7a2e\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u9069\u5408\u7528\u65bc\u7cfb\u7d71\u7de8\u7a0b\u548c\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u3002\u5176\u512a\u52e2\u5728\u65bc\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u512a\u8d8a\uff1a<\/strong> C\u8a9e\u8a00\u7684\u57f7\u884c\u901f\u5ea6\u5feb\uff0c\u9069\u5408\u9700\u8981\u9ad8\u6548\u8655\u7406\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u63a7\u5236\u529b\u5f37\uff1a<\/strong> \u958b\u767c\u8005\u53ef\u4ee5\u5c0d\u5167\u5b58\u7ba1\u7406\u548c\u7cfb\u7d71\u8cc7\u6e90\u9032\u884c\u7cbe\u7d30\u63a7\u5236\u3002<\/li>\n<li><strong>\u5ee3\u6cdb\u7684\u5eab\u652f\u6301\uff1a<\/strong> C\u8a9e\u8a00\u64c1\u6709\u8c50\u5bcc\u7684\u5eab\uff0c\u53ef\u4ee5\u8f15\u9b06\u96c6\u6210\u5404\u7a2e\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%e7%9a%84api-gDIpyXLiTn\">\u7372\u53d6\u5929\u6c23\u6578\u64da\u7684API<\/h2>\n<p>\u5728\u958b\u59cb\u7de8\u5beb\u4ee3\u78bc\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u9078\u64c7\u4e00\u500b\u5408\u9069\u7684\u5929\u6c23\u6578\u64daAPI\u3002\u8a31\u591a\u670d\u52d9\u63d0\u4f9b\u5546\u63d0\u4f9b\u514d\u8cbb\u6216\u4ed8\u8cbb\u7684API\u4f86\u7372\u53d6\u5929\u6c23\u6578\u64da\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/openweathermap.org\/api\" rel=\"nofollow noopener\" target=\"_blank\">OpenWeatherMap<\/a><\/li>\n<li><a href=\"https:\/\/weatherapi.com\/\" rel=\"nofollow noopener\" target=\"_blank\">WeatherAPI<\/a><\/li>\n<li><a href=\"https:\/\/api.weather.com\/\" rel=\"nofollow noopener\" target=\"_blank\">Weather.com API<\/a><\/li>\n<\/ul>\n<p>\u9019\u4e9bAPI\u901a\u5e38\u63d0\u4f9bJSON\u683c\u5f0f\u7684\u6578\u64da\uff0c\u65b9\u4fbf\u6211\u5011\u5728C\u8a9e\u8a00\u4e2d\u9032\u884c\u89e3\u6790\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8c%e8%aa%9e%e8%a8%80%e7%8d%b2%e5%8f%96%e5%a4%a9%e6%b0%a3%e6%95%b8%e6%93%9a%e7%9a%84%e6%ad%a5%e9%a9%9f-gDIpyXLiTn\">\u4f7f\u7528C\u8a9e\u8a00\u7372\u53d6\u5929\u6c23\u6578\u64da\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e5%ae%89%e8%a3%9d%e5%bf%85%e8%a6%81%e7%9a%84%e5%ba%ab-gDIpyXLiTn\">1. \u5b89\u88dd\u5fc5\u8981\u7684\u5eab<\/h3>\n<p>\u5728C\u8a9e\u8a00\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528libcurl\u5eab\u4f86\u767c\u9001HTTP\u8acb\u6c42\uff0c\u4e26\u4f7f\u7528cJSON\u5eab\u4f86\u89e3\u6790JSON\u6578\u64da\u3002\u9996\u5148\uff0c\u78ba\u4fdd\u4f60\u5df2\u7d93\u5b89\u88dd\u4e86\u9019\u4e9b\u5eab\uff1a<\/p>\n<pre><code>sudo apt-get install libcurl4-openssl-dev\nsudo apt-get install libcjson-dev<\/code><\/pre>\n<h3 id=\"2-%e7%b7%a8%e5%af%ab%e4%bb%a3%e7%a2%bc-gDIpyXLiTn\">2. \u7de8\u5beb\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u7372\u53d6\u5929\u6c23\u6578\u64da\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;string.h&gt;\n#include &lt;curl\/curl.h&gt;\n#include &lt;cjson\/cJSON.h&gt;\n\nstruct MemoryStruct {\n  char *memory;\n  size_t size;\n};\n\nstatic size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, struct MemoryStruct *userp) {\n  size_t realsize = size * nmemb;\n  userp-&gt;memory = realloc(userp-&gt;memory, userp-&gt;size + realsize + 1);\n  if(userp-&gt;memory == NULL) {\n    printf(\"not enough memory (realloc returned NULL)n\");\n    return 0;\n  }\n  memcpy(&amp;(userp-&gt;memory[userp-&gt;size]), contents, realsize);\n  userp-&gt;size += realsize;\n  userp-&gt;memory[userp-&gt;size] = 0;\n  return realsize;\n}\n\nint main(void) {\n  CURL *curl;\n  CURLcode res;\n  struct MemoryStruct chunk;\n\n  chunk.memory = malloc(1);\n  chunk.size = 0;\n\n  curl = curl_easy_init();\n  if(curl) {\n    curl_easy_setopt(curl, CURLOPT_URL, \"https:\/\/api.openweathermap.org\/data\/2.5\/weather?q=HongKong&amp;appid=YOUR_API_KEY\");\n    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);\n    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&amp;chunk);\n    res = curl_easy_perform(curl);\n    curl_easy_cleanup(curl);\n\n    if(res == CURLE_OK) {\n      cJSON *json = cJSON_Parse(chunk.memory);\n      cJSON *weather = cJSON_GetObjectItem(json, \"weather\");\n      printf(\"Weather: %sn\", cJSON_GetObjectItem(weather, \"description\")-&gt;valuestring);\n      cJSON_Delete(json);\n    }\n\n    free(chunk.memory);\n  }\n  return 0;\n}<\/code><\/pre>\n<h3 id=\"3-%e7%b7%a8%e8%ad%af%e5%92%8c%e9%81%8b%e8%a1%8c-gDIpyXLiTn\">3. \u7de8\u8b6f\u548c\u904b\u884c<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u7de8\u8b6f\u4ee3\u78bc\uff1a<\/p>\n<pre><code>gcc -o weather weather.c -lcurl -lcjson<\/code><\/pre>\n<p>\u7136\u5f8c\u904b\u884c\u751f\u6210\u7684\u53ef\u57f7\u884c\u6587\u4ef6\uff1a<\/p>\n<pre><code>.\/weather<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gDIpyXLiTn\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4f7f\u7528C\u8a9e\u8a00\u548c\u5408\u9069\u7684API\uff0c\u6211\u5011\u53ef\u4ee5\u5feb\u901f\u7372\u53d6\u5929\u6c23\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u958b\u767c\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\u662f\u975e\u5e38\u6709\u7528\u7684\u3002\u7121\u8ad6\u662f\u7528\u65bc\u500b\u4eba\u9805\u76ee\u9084\u662f\u5546\u696d\u61c9\u7528\uff0c\u638c\u63e1\u9019\u9805\u6280\u80fd\u90fd\u80fd\u70ba\u4f60\u5e36\u4f86\u66f4\u591a\u7684\u6a5f\u6703\u3002\u5982\u679c\u4f60\u9700\u8981\u7a69\u5b9a\u7684\u4f3a\u670d\u5668\u4f86\u904b\u884c\u4f60\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u5c07\u70ba\u4f60\u7684\u9805\u76ee\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528C\u8a9e\u8a00\u5feb\u901f\u7372\u53d6\u5929\u6c23\u6578\u64da\uff0c\u8f15\u9b06\u9023\u63a5\u5929\u6c23\u6578\u64da\u5eab\uff0c\u5be6\u73fe\u5373\u6642\u5929\u6c23\u67e5\u8a62\u8207\u5206\u6790\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-166003","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166003","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=166003"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166003\/revisions"}],"predecessor-version":[{"id":166004,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166003\/revisions\/166004"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=166003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=166003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=166003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}