在C語(yǔ)言里，類(lèi)是面向?qū)ο缶幊痰囊环N方式，C++語(yǔ)言比較常用，但是也可以在C語(yǔ)言中使用。類(lèi)的定義一般包括數(shù)據(jù)成員和成員函數(shù)。數(shù)據(jù)成員用于記錄對(duì)象的狀態(tài)，成員函數(shù)用于操作對(duì)象。

typedef struct {
int age;
char *name;
} Person;
void Person_set_age(Person* person, int age) {
person->age = age;
}
int Person_get_age(Person* person) {
return person->age;
}

JSON字符串是一種輕量級(jí)的數(shù)據(jù)交換格式。它是由 JavaScript 對(duì)象表示法 (JavaScript Object Notation) 衍生而來(lái)的，但是現(xiàn)在被許多編程語(yǔ)言所支持。JSON字符串用于數(shù)據(jù)傳輸和存儲(chǔ)，通常用于Web應(yīng)用程序的后端和前端通信。

{
"name": "Tom",
"age": 23,
"address": {
"city": "Beijing",
"province": "Beijing"
}
}

在C語(yǔ)言中，可以使用 json-c 庫(kù)來(lái)解析和生成 JSON字符串。

void parse_json(char* json_string) {
json_object *jobject, *address;
jobject = json_tokener_parse(json_string);
printf("name: %s\n", json_object_get_string(json_object_object_get(jobject, "name")));
printf("age: %d\n", json_object_get_int(json_object_object_get(jobject, "age")));
address = json_object_object_get(jobject, "address");
printf("address.city: %s\n", json_object_get_string(json_object_object_get(address, "city")));
printf("address.province: %s\n", json_object_get_string(json_object_object_get(address, "province")));
}
void generate_json() {
json_object *jobject, *address;
jobject = json_object_new_object();
json_object_object_add(jobject, "name", json_object_new_string("Tom"));
json_object_object_add(jobject, "age", json_object_new_int(23));
address = json_object_new_object();
json_object_object_add(address, "city", json_object_new_string("Beijing"));
json_object_object_add(address, "province", json_object_new_string("Beijing"));
json_object_object_add(jobject, "address", address);
printf("%s\n", json_object_to_json_string(jobject));
}