鍵盤上的舞者

     摘要: 在用數(shù)組作為數(shù)據(jù)結(jié)構(gòu)存儲(chǔ)數(shù)據(jù)的時(shí)候，一不小心就訪問越界了，這類錯(cuò)誤有時(shí)候很不容易發(fā)現(xiàn)。為此自己封裝一個(gè)專門用來(lái)訪問數(shù)組元素的指針類模板。此類模板需要數(shù)組的元素類型，起始地址，大小來(lái)構(gòu)造一個(gè)安全的Ptr2T指針對(duì)象，此對(duì)象訪問數(shù)組的方法不但與普通的指針相同，同時(shí)還增加了越界的安全檢查。  閱讀全文

     摘要: 在設(shè)計(jì)一個(gè)Date類的時(shí)候，我們使用int類型來(lái)表示年份，如果我們需要對(duì)年份進(jìn)行一些特殊的操作（如：檢查，保護(hù)等），就很需要定義一個(gè)Year類，如下：  閱讀全文

     摘要: An additional version of operator new enables you to construct an object or an array of objects at a predetermined memory position. This version is called placement new and has many useful applications, including building a custom-made memory pool or a garbage collector. Additionally, it can be used in mission-critical applications because there's no danger of allocation failure; the memory that's used by placement new has already been allocated. Placement new is also faster because the cons  閱讀全文