C語(yǔ)言提供了JSON解析庫(kù)，可以方便地從JSON中取出數(shù)據(jù)類型。

#include#include#include#includeint main(int argc, char **argv) {
const char *json_str = "{\"name\":\"John\",\"age\":30,\"isMarried\":true}";
struct json_object *obj = json_tokener_parse(json_str);
enum json_type type;
// name
json_object_object_get_ex(obj, "name", &tmp);
type = json_object_get_type(tmp);
printf("name type: %s\n", json_type_to_name(type));
// age
json_object_object_get_ex(obj, "age", &tmp);
type = json_object_get_type(tmp);
printf("age type: %s\n", json_type_to_name(type));
// isMarried
json_object_object_get_ex(obj, "isMarried", &tmp);
type = json_object_get_type(tmp);
printf("isMarried type: %s\n", json_type_to_name(type));
json_object_put(tmp);
json_object_put(obj);
return 0;
}

以上代碼解析了一個(gè)JSON字符串，然后從中取出了三個(gè)鍵值對(duì)的數(shù)據(jù)類型，分別為"name"的字符串類型、"age"的整型類型和"isMarried"的布爾類型。