C語(yǔ)言作為一種常用的編程語(yǔ)言，可以輕松地獲取遠(yuǎn)程的JSON數(shù)據(jù)。JSON數(shù)據(jù)的獲取可以幫助我們實(shí)現(xiàn)各種功能，如數(shù)據(jù)可視化、數(shù)據(jù)存儲(chǔ)等。下面我們就來(lái)了解一下如何使用C語(yǔ)言獲取遠(yuǎn)程的JSON數(shù)據(jù)。

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
struct data {
size_t size;
char* content;
};
static size_t callback(void* ptr, size_t size, size_t nmemb, struct data* stream) {
size_t data_size = size * nmemb;
stream->content = (char*)realloc(stream->content, stream->size + data_size + 1);
if (stream->content == NULL) {
printf("Failed to allocate memory for JSON data!\n");
return 0;
}
memcpy(&(stream->content[stream->size]), ptr, data_size);
stream->size += data_size;
stream->content[stream->size] = '\0';
return data_size;
}
char* get_json_data() {
CURL* curl;
CURLcode res;
struct data stream;
stream.content = (char*)malloc(1);
stream.size = 0;
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if (curl) {
curl_easy_setopt(curl, CURLOPT_URL, "YOUR_JSON_API_URL");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, callback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
printf("Error: %s", curl_easy_strerror(res));
return NULL;
}
curl_easy_cleanup(curl);
}
curl_global_cleanup();
return stream.content;
}
int main(void) {
char* json_data = get_json_data();
printf("%s", json_data);
free(json_data);
return 0;
}

上述代碼使用CURL庫(kù)來(lái)獲取JSON數(shù)據(jù)。在回調(diào)函數(shù)中，我們將獲取到的數(shù)據(jù)存儲(chǔ)到一個(gè)結(jié)構(gòu)體中，然后返回給主函數(shù)。接著我們?cè)谥骱瘮?shù)中輸出獲取到的數(shù)據(jù)。