[Considerations for C/c++]_[Intermediate]_[delete class object pointers]

Scene:
1. C + + classes have constructors and destructors that are used to release resources when class objects are deleted (or when local variables are automatically destroyed).

2. C + + Class object Pointers in many cases need to be assigned to void* universal pointers to achieve the purpose of transmitting objects, but often this void* pointer is the source of memory leaks or program errors,

This is why C + + has a generic purpose, and it is also designed to eliminate this object uncertainty at compile time, avoiding delete or use errors.

OK, look at the code, what's wrong with the following code?

Test_class.cpp: Defines the entry point of the console application. #include "stdafx.h" #include <iostream>class a{public:a () {i = new int;} ~a () {Delete I;} int* i;}; Class B{public:b (void* data) {data_ = data;} ~b () {delete data_;} Void* Data_;}; Template <class t>class c{public:c (t* data) {data_ = data;} ~c () {delete data_;} T* Data_;}; void wrong () {A *a = new A (); b b (a); When a function returns, A's destructor does not call}void right () {A *a = new A (); C<a> c (A); When the function returns, A's destructor calls}int _tmain (int argc, _tchar* argv[]) {wrong (); Right (); return 0;}

[Considerations for C/c++]_[Intermediate]_[delete class object pointers]