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作者 QQ29 在 PTT [ C_and_CPP ] 看板的留言(推文), 共2161則
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3F推:sizof(array)/ sizeof(array type)04/28 23:15
3F→:可以用阿 每次寫header .h檔案 寫這是好習慣04/27 14:04
4F→:只是 這個ifndef 你要想成 他只再同一個檔案作用04/27 14:04
5F→:你不能想成說 你include一次abc.h了 下次不管誰include 都04/27 14:05
6F→:不會去include了 這是不對的04/27 14:05
11F→:簡單說就是 你別的檔案要用這函式 就該這樣寫04/27 14:19
12F→:不然應該就像上一篇推文的大大說要用inline了04/27 14:19
4F推:1. int *p=new int; int a; p=&a;04/26 23:08
17F推:*p=a會當機吧 而且這樣也不是 dangling ptr了04/27 01:01
20F推:應該是沒人管得到那個空間了04/27 01:14
1F推:cmath?04/25 23:24
3F→:有錯字嘛? 請指正!!04/25 21:32
5F→:喔喔 謝謝改一下04/25 21:39
1F推:謝謝你的解說 受益良多04/24 02:06
6F→:我記得其實沒有什麼call by address嗎? 所以副程式就辦法取得04/23 13:23
7F→:長度嚕04/23 13:24
3F→:這用法不是指針對this阿 你自訂型態的指標也可以這樣寫04/23 01:13
1F推: p[i]=new int [row]; 是不是寫錯? 你這樣不就row*row維度??04/23 01:10
2F推:先判斷你p*q維度會變多少 再new一個去紀錄吧04/23 01:12
1F推:這記憶體位置不是不一定嘛 你要用舊new int ;阿04/23 00:00