Hello, I have an idea to use an union structure to store the value. Just as follows:

`// union of a cJSON value
typedef union cJSON_Value {
// suppose the size of a pointer is 4-byte. valuestring[1] may be useless.
char *valuestring[2];
int valueint[2];
double valuedouble;
} cJSON_Value;

// struct of cJSON
typedef struct cJSON {
struct cJSON _next,_prev;
struct cJSON *child;
int type;
cJSON_Value value;
char *string;
} cJSON;`

The use of union can reduce the size of a JSON on the sacrifice of the portability. So, it's just a suggestion.