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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.
write a program that adds all numbers from 1 to 200
13446
# include stdio.h> # include conio.h> # include string.h> void main() { int i=0,j=0; char a[100],temp; clrscr();
program
Described the difference among "new" and "operator new" ? A:"operator new" works such as malloc.
c program to count the number of occurances of the string in padovan''s string
A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome
You are required to write a stand-alone DSP application in the C programming language. The overall objective of this application is to convert a signal from the time domain to t
what are objects or simply define objects
what are 3 conditions under which the sequential search of a list is preferable to binary search?
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