| 基类訪问权限 | 类继承方式 | 子类訪问权限 | |
| public | public | ||
| protected | public | protected | |
| private | No Access | ||
| public | protected | ||
| protected | protected | protected | |
| private | No Access | ||
| public | private | ||
| protected | private | private | |
| private | No Access | ||
| 基类訪问权限 | 类继承方式 | 子类訪问 | 子类对象訪问 |
| public | ok | ok | |
| protected | public | ok | no |
| private | no | no | |
| public | ok | ok | |
| protected | protected | ok | no |
| private | no | no | |
| public | ok | no | |
| protected | private | ok | no |
| private | no | no |
原文：http://www.cnblogs.com/liguangsunls/p/7226013.html