什么是懸空的指針？我知道這是個很常見的問題，但對我來說還是新鮮的！我不明白懸掛指針的概念，在谷歌上搜索，并編寫測試方法來找到一個。我只是想知道這是一個懸空的指針嗎？無論我找到什么例子，都會返回一些東西，這里我正在嘗試類似的東西！謝謝!void foo(const std::string name){
// will it be Dangling pointer?!, with comments/Answer
// it could be if in new_foo, I store name into Global.
// Why?! And what is safe then?
new_foo(name.c_str());}void new_foo(const char* name){
// print name or do something with name... }
3 回答
DIEA
TA貢獻1820條經驗 獲得超3個贊
Class *object = new Class();Class *object2 = object;delete object;object = nullptr;// now object2 points to something which is not valid anymore
Object *method() {
Object object;
return &object;}Object *object2 = method();// object2 points to an object which has been removed from stack after exiting the functionc_strconst char *name
const char *namenew_foo
四季花海
TA貢獻1811條經驗 獲得超5個贊
name
delete}}unique_ptr<T>T*unique_ptr::~unique_ptr
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