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Yahoo!奇摩知識+ - 分類問答 - 電腦網路 - 發問中 
struct相關
Jul 25th 2013, 19:01

假設有一struct

struct list_int{
pint *p;
int i;
};

並建立一個list_int
list_int l;
l.p = &l;
l.a = 5;

問
cout<<b.p->p->p->p->p->p->p->p->p->a;
cout<<b.p->a;
兩指令執行速度一樣嗎?

很多函式都會新增變數
例如
int example(const list_int &l){
const int a = l.i;
....
...
}
為何不直接用l.i
是效率問題
還是閱讀性問題

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