增加libcurl库调用百度API，与原来的的go命令执行调用API两种。libcurl涉及静态链接，考虑使用哪种？

libcurl.h

@@ -0,0 +1,51 @@
+#ifndef LIBCURL_H
+#define LIBCURL_H
+
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <curl/curl.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <assert.h>
+#include <limits.h>
+#include <stdarg.h>
+
+#include <cjson/cJSON.h>
+
+// 定义嵌套的数据结构
+typedef struct {
+    char continent[64];
+    char country[64];
+    char zipcode[64];
+    char owner[64];
+    char isp[64];
+    char adcode[64];
+    char prov[64];
+    char city[64];
+    char district[64];
+    char region[64];
+} Data;
+
+// 定义主结构
+typedef struct {
+    char code[32];
+    Data data;
+    char ip[64];
+
+    char continent_country[256];
+} Response;
+
+
+extern char *curl_get_area(char *URL);
+extern int parse_json_to_struct(const char *json_string, Response *response);
+
+
+
+#endif