C語言作為一門底層語言，獲取Json節點值需要借助第三方庫，如cJSON庫。

#include <stdio.h>
#include <cJSON.h>
int main()
{
char *jsonstr = "{\"name\":\"Tom\",\"age\":18,\"score\":[89,96,87],\"address\":{\"city\":\"Beijing\",\"street\":\"Tiananmen Square\"}}";
cJSON *root = cJSON_Parse(jsonstr);
//獲取String值
cJSON *name = cJSON_GetObjectItem(root, "name");
printf("name is %s\n", name->valuestring);
//獲取Int值
cJSON *age = cJSON_GetObjectItem(root, "age");
printf("age is %d\n", age->valueint);
//獲取Array值
cJSON *score = cJSON_GetObjectItem(root, "score");
cJSON *s1 = cJSON_GetArrayItem(score, 0);
cJSON *s2 = cJSON_GetArrayItem(score, 1);
cJSON *s3 = cJSON_GetArrayItem(score, 2);
printf("score is %d,%d,%d\n", s1->valueint, s2->valueint, s3->valueint);
//獲取Object值
cJSON *address = cJSON_GetObjectItem(root, "address");
cJSON *city = cJSON_GetObjectItem(address, "city");
cJSON *street = cJSON_GetObjectItem(address, "street");
printf("address is %s,%s\n", city->valuestring, street->valuestring);
cJSON_Delete(root);
return 0;
}

通過cJSON庫提供的函數，我們可以輕松地獲取Json節點的各種值。