linux下cjson

#include <stdio.h>
#include <stdlib.h>
#include "cJSON.h"

int main() {
    // 解析 JSON 字符串
    const char *json_str = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
    cJSON *root = cJSON_Parse(json_str);
    if (root == NULL) {
        printf("Error before: [%s]\n", cJSON_GetErrorPtr());
        return 1;
    }

    // 获取 JSON 对象中的值
    cJSON *name = cJSON_GetObjectItemCaseSensitive(root, "name");
    cJSON *age = cJSON_GetObjectItemCaseSensitive(root, "age");
    cJSON *city = cJSON_GetObjectItemCaseSensitive(root, "city");

    printf("Name: %s\n", name->valuestring);
    printf("Age: %d\n", age->valueint);
    printf("City: %s\n", city->valuestring);

    // 生成 JSON 字符串
    cJSON *new_root = cJSON_CreateObject();
    cJSON_AddStringToObject(new_root, "name", "Jane");
    cJSON_AddNumberToObject(new_root, "age", 25);
    cJSON_AddStringToObject(new_root, "city", "Los Angeles");

    char *new_json_str = cJSON_Print(new_root);
    printf("New JSON: %s\n", new_json_str);

    // 释放内存
    cJSON_Delete(root);
    cJSON_Delete(new_root);
    free(new_json_str);

    return 0;
}