cJSON遍历实例代码

cJSON遍历实例代码如下：

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

void traverse(cJSON *root) {
    if (root == NULL) {
        return;
    }
    
    switch (root->type) {
        case cJSON_False:
            printf("False\n");
            break;
        case cJSON_True:
            printf("True\n");
            break;
        case cJSON_NULL:
            printf("NULL\n");
            break;
        case cJSON_Number:
            printf("Number: %lf\n", root->valuedouble);
            break;
        case cJSON_String:
            printf("String: %s\n", root->valuestring);
            break;
        case cJSON_Array:
            printf("Array:\n");
            cJSON *child = root->child;
            while (child != NULL) {
                traverse(child);
                child = child->next;
            }
            break;
        case cJSON_Object:
            printf("Object:\n");
            cJSON *item = root->child;
            while (item != NULL) {
                printf("Key: %s\n", item->string);
                traverse(item);
                item = item->next;
            }
            break;
        default:
            break;
    }
}

int main() {
    const char *jsonStr = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";
    cJSON *root = cJSON_Parse(jsonStr);
    
    traverse(root);
    
    cJSON_Delete(root);
    return 0;
}

上述代码通过cJSON库解析了一个JSON字符串，并实现了遍历JSON对象的功能。遍历函数traverse()通过递归地遍历cJSON对象的子节点，根据节点的类型打印出相应的信息。在主函数中，我们首先将JSON字符串解析为cJSON对象，然后调用traverse()函数进行遍历，最后释放资源。

希望以上代码能对您有所帮助。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [ESP32-C3入门教程 系统篇④——cJSON应用实例 | C语言中超轻量级JSON解析器](https://blog.csdn.net/kangweijian/article/details/124579543)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *3* [cJSON方法详解](https://blog.csdn.net/jhyBOSS/article/details/108375390)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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