cjson 使用方法

https://blog.csdn.net/lintax/article/details/51549345

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int str_to_cJSON(char *json_string, char *str_val) {     char * out=NULL;     cJSON *root=cJSON_CreateObject();     if (!root)     {         printf("Error before: [%s]\n",cJSON_GetErrorPtr());         return -1;     }     else     {         cJSON *item=cJSON_CreateString("Brett");         cJSON_AddItemToObject(root,"firstName",item);            out=cJSON_Print(root);         printf("out2:%s\n",out);            cJSON_Delete(root);         if(out!=NULL)         {             free(out);         }     }     return 0; }