作者hiroki1139 (小波)
看板EE_DSnP
標題[問題] 理解不能的compile error
時間Wed Dec 15 11:26:23 2010
是這樣的
在erase的時候我想把BSTreeNode的_data assign成0
結果就出現compile error了
../../include/bst.h: In member function ‘bool
BSTree<T>::erase(BSTree<T>::iterator) [with T = AdtTestObj]’:
adtTest.h:99: instantiated from here
../../include/bst.h:194: error: no match for ‘operator=’ in ‘
((BSTree<AdtTestObj>*)this)->BSTree<AdtTestObj>::_root->BSTreeNode<AdtTestObj>::_data
= 0’
adtTest.h:62: note: candidates are: AdtTestObj& AdtTestObj::operator=(const
AdtTestObj&)
adtTest.h:99: instantiated from here
../../include/bst.h:210: error: no match for ‘operator=’ in ‘
pos.BSTree<AdtTestObj>::iterator::_node->BSTreeNode<AdtTestObj>::_data = 0’
adtTest.h:62: note: candidates are: AdtTestObj& AdtTestObj::operator=(const
AdtTestObj&)
adtTest.h:99: instantiated from here
../../include/bst.h:217: error: no match for ‘operator=’ in ‘
y->BSTreeNode<AdtTestObj>::_data = 0’
adtTest.h:62: note: candidates are: AdtTestObj& AdtTestObj::operator=(const
AdtTestObj&)
../../include/bst.h: In constructor ‘BSTree<T>::BSTree() [with T =
AdtTestObj]’:
我想是沒有定義在AdtTest裡的=
(好想自己定義><
不知道有沒有別的方法呢
還有以下三行也是看不太懂
../../include/bst.h:38: error: no matching function for call to ‘
BSTreeNode<AdtTestObj>::BSTreeNode(int)’
../../include/bst.h:21: note: candidates are: BSTreeNode<T>::BSTreeNode(const
T&, BSTreeNode<T>*, BSTreeNode<T>*, BSTreeNode<T>*) [with T = AdtTestObj]
../../include/bst.h:18: note:
BSTreeNode<AdtTestObj>::BSTreeNode(const BSTreeNode<AdtTestObj>&)
38行和21行分別是BSTree和BSTreeNode的constructor
21> BSTreeNode(const T& d, BSTreeNode<T>* p = 0, BSTreeNode<T>* l = 0,
BSTreeNode<T>* r = 0):
_data(d),_parent(p),_left(l),_right(r) {}
38> BSTree() : _size(0) { _root = new BSTreeNode<T>(0); }
謝謝了^^
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1F：推 ric2k1:請檢查一下你的 const... 12/15 11:33
2F：推 wwjd123:怎麼有種相似 少一個}的感覺 12/15 11:38
3F：推 johnjohnlin:new BSTreeNode<T>(T())？ 12/15 11:45
4F：推 tomap41017:推樓上，你的_data存的是物件不是指標，不可以給0初始 12/15 12:04
5F：→ tomap41017:所以assign _data = 0會編譯錯誤是正常 12/15 12:04
6F：推 wintercobra:可以改用_root = newBSTreeNode<T>( T() ); 12/15 12:12
7F：→ wintercobra:但,改node的constructor成BSTreeNode(const T d, ...) 12/15 12:13
8F：→ hiroki1139:這樣不會有memory leak嗎@@ 12/15 12:35