C語言構(gòu)建JSON數(shù)據(jù)是一種十分方便的方式，因為C語言是一種強(qiáng)類型語言，可以更加精確地控制JSON數(shù)據(jù)的結(jié)構(gòu)和格式。

// 一個C語言的JSON結(jié)構(gòu)體
typedef struct json_object {
int type;
void *data;
} json_object;
// 一個JSON數(shù)據(jù)的例子
{
"name": "小明",
"age": 18,
"hobby": ["籃球", "游戲"]
}
// 用C語言實現(xiàn)該JSON數(shù)據(jù)
json_object *name = (json_object *)malloc(sizeof(json_object));
name->type = STRING_TYPE;
name->data = "小明";
json_object *age = (json_object *)malloc(sizeof(json_object));
age->type = INT_TYPE;
age->data = (void *)18;
json_object *hobby = (json_object *)malloc(sizeof(json_object));
hobby->type = ARRAY_TYPE;
hobby->data = (void *)malloc(2 * sizeof(json_object *));
((json_object **)hobby->data)[0] = (json_object *)malloc(sizeof(json_object));
((json_object **)hobby->data)[0]->type = STRING_TYPE;
((json_object **)hobby->data)[0]->data = "籃球";
((json_object **)hobby->data)[1] = (json_object *)malloc(sizeof(json_object));
((json_object **)hobby->data)[1]->type = STRING_TYPE;
((json_object **)hobby->data)[1]->data = "游戲";
json_object *result = (json_object *)malloc(sizeof(json_object));
result->type = OBJECT_TYPE;
result->data = (void *)malloc(3 * sizeof(key_value_pair));
((key_value_pair *)result->data)[0].key = "name";
((key_value_pair *)result->data)[0].value = name;
((key_value_pair *)result->data)[1].key = "age";
((key_value_pair *)result->data)[1].value = age;
((key_value_pair *)result->data)[2].key = "hobby";
((key_value_pair *)result->data)[2].value = hobby;

以上代碼使用了自定義的JSON結(jié)構(gòu)體和鍵值對結(jié)構(gòu)體，通過動態(tài)內(nèi)存分配的方式申請了所需的空間，并為每個元素設(shè)置了類型和數(shù)據(jù)。使用這種方式可以避免手動構(gòu)建JSON字符串時的拼寫錯誤和格式問題。