More Effective C++ 讀書筆記 之 區別pointer和reference

原創 blueboy82006 2020-07-05 17:22

reference不能是空，必須有初值。

通常在reference和point都適用時，reference有更好的效率（因爲reference不需要測試是否爲NULL）。


當需要指向某個東西而且決不會改指其它東西，

或是當實現一個操作符而其語法需求無法由pointer達成時(如operator[])，

就應該選擇references；

任何其他時候，採用pointer.

 

 

 

 

    


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