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c list 轉(zhuǎn) json

在C語言中,有時(shí)需要將數(shù)據(jù)以JSON的格式輸出,以方便后續(xù)的處理。本文將介紹如何將C List轉(zhuǎn)換為JSON格式。

首先需要導(dǎo)入json-c庫,代碼如下:

#include "json-c/json.h"

接著,定義一個(gè)函數(shù)將C List轉(zhuǎn)換為JSON字符串:

char* list_to_json_string(struct list_head* list) {
struct list_head* pos;
char* result;
int i = 0;
struct json_object* array = json_object_new_array();
list_for_each(pos, list) {
struct json_object* object = json_object_new_object();
struct node* node = list_entry(pos, struct node, list);
json_object_object_add(object, "id", json_object_new_int(node->id));
json_object_object_add(object, "name", json_object_new_string(node->name));
json_object_object_add(object, "age", json_object_new_int(node->age));
json_object_array_add(array, object);
i++;
}
result = strdup(json_object_to_json_string(array));
json_object_put(array);
return result;
}

上述代碼中,我們使用了json_object_new_array和json_object_new_object函數(shù)創(chuàng)建JSON對(duì)象,然后使用json_object_object_add函數(shù)將對(duì)象中的各個(gè)屬性添加到JSON中。最后,使用json_object_to_json_string將JSON對(duì)象轉(zhuǎn)換為JSON字符串。

使用時(shí),只需要將要轉(zhuǎn)換的C List作為參數(shù)傳入list_to_json_string函數(shù),即可獲得JSON格式的數(shù)據(jù)。