delete关键字

Posted 2020-12-12 demonkuromi

delete使用注意

 1 class A{};
 2 int main()
 3     A a;
 4     A* p;
 5     p = &a;
 6     //delete p;//这样会导致调用两次析构函数.是会引起程序错误的
 7     p = NULL;
 8 
 9     p = new A;//正确方式，delete和new搭配
10     delete p;
11     p = NULL;
12 }

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