linux下使用cjson

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

int main() {
    const char *json_str = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
    cJSON *root = cJSON_Parse(json_str);

    if (root == NULL) {
        const char *error_ptr = cJSON_GetErrorPtr();
        if (error_ptr != NULL) {
            fprintf(stderr, "Error before: %s\n", error_ptr);
        }
        return 1;
    }

    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);

    cJSON_Delete(root);
    return 0;
}

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

int main() {
    cJSON *root = cJSON_CreateObject();
    cJSON_AddStringToObject(root, "name", "John");
    cJSON_AddNumberToObject(root, "age", 30);
    cJSON_AddStringToObject(root, "city", "New York");

    char *json_str = cJSON_Print(root);
    printf("%s\n", json_str);

    free(json_str);
    cJSON_Delete(root);
    return 0;
}