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A: The simplest instance of a smart pointer is auto_ptr that is included in the standard C++ library. Auto Pointer only takes care of Memory leak & does nothing regarding dangling pointers issue. You can determine it in the header . Here is part of auto_ptr's implementation, to illustrate what it does:
template class auto_ptr
{
T* ptr;
public:
explicit auto_ptr(T* p = 0) : ptr(p) {}
~auto_ptr() {delete ptr;}
T& operator*() {return *ptr;} T* operator->() {return ptr;}
// ...
};
As you can illustrate, auto_ptr is a simple wrapper around a regular pointer. It forwards all significant operations to this pointer (dereferencing & indirection). Its elegance within the destructor: the destructor takes care of deleting the pointer.
For the user of auto_ptr, it means that rather then writing:
void foo()
MyClass* p(new MyClass);
p->DoSomething();
delete p;
}
You can write down following:
auto_ptr p(new MyClass);
And trust p to clean up after itself.
A: Use a member while you can and a friend when you need to. Sometimes friends are better syntactically (e.g., in class Fred, friend functions let the Fred parameter to be secon
Write a C program to compute the factorial of 5 i.e. 1x2x3x4x5 etc Write a C program to calculate the output Y for a given value of X for the following formula. Y=X 2
please send code for inverted index file
P o i n t e r d e c l a r a t i o n f o r d a t a m e m b e r : M e t h o d 1 : i n t M : : * p x ; / / T h i s
I started preparing an alternative cryptocurrency and I am way over my head. I would like help in making modifications to the open source files and then help with deployment. I wil
please may i have a brief theory about a c++ program to find net salary of employees
You are going to write a function that computes the total interest charged on a credit card before it is paid off. List all the inputs the function will need.
how to create database of faculty database......... send me with program
write a c++ code to implement use of a constructor
Question: (a) A bank has four types of accounts with annual interest rates as follows: Savings 8% Savings with Cheque Book 5% Current 4% Fixed deposits 10% Using
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