类继承问题
c++ 继承
有一个Date类，year，month，day三个私有成员。我想public继承，并且加入date对象+int以后的日期显示功能，例如2013\2\6+12=2013\2\18。那么我在子类里面不能直接修改基类私有成员a.day=(a.day+12)%30这样是不行的，我该怎么写才能实现功能？有人告诉我可以在基类里添加函数，子类再写一个函数进行数的传递，利用基类函数修改基类私有成员，但是我觉得不合适，既然这么麻烦为什么还要继承呢？希望各位帮我一下，谢谢。
回复讨论(解决方案)
你没有理解什么是“私有”
继承很显然是“公有”的部分
本人初学，怎么解决呢？
认真学习基础知识
既然变量是私有的，就只能这么办了。毕竟这些变量你是继承不来的。当然也可以让父类提供+的方法，子类直接调用
你没有理解什么是“私有”
继承很显然是“公有”的部分
还有受保护的部分
呵呵，不拘小节才能成大器
你没有理解什么是“私有”
继承很显然是“公有”的部分
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