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A: A smart pointer is a C++ class which mimics a regular pointer in syntax and some semantics, however it does more. Since smart pointers to distinct types of objects tend to have a lot of code in common, approximately all good-quality smart pointers in existence are templated trhough the pointee type, as you can notice in the following code:
template
class SmartPtr
{
public:
explicit SmartPtr(T* pointee) : pointee_(pointee); SmartPtr& operator=(const SmartPtr& other);
~SmartPtr();
T& operator*() const
...
return *pointee_;
}
T* operator->() const
return pointee_;
private:
T* pointee_;
};
SmartPtr aggregates a particular pointer to T in its member variable pointee_. Most smart pointers do this. In some of the cases, a smart pointer may aggregate some handles to data and compute the pointer on the fly.
The two operators give SmartPtr pointer-like semantics and syntax. i.e., you can write
class Widget
void Fun();
SmartPtr sp(new Widget);
sp->Fun(); (*sp).Fun();
Sideways from the definition of sp, nothing reveals it since not being a pointer. It is the mantra of smart pointers: You can replace pointer definitions along with smart pointer definitions without incurring major changes to your application's code. Thus you get extra goodies along with ease. Minimizing code changes is extremely appealing and essential for getting large applications to employ smart pointers. However, smart pointers are not a free lunch.
Structure of C++ Program: Chronological order of C++ program. 1. Class declaration 2. Main function program 3. Member functions definitions 4. Include heade
A string is said to be "Beautiful"€, if it contains only non repetitive alphabets
Description: Create a program that allows the user to track the hours an employee worked in a week. How much the employee was paid and any extra hours worked (overtime pay).
Define a procedure that takes three numbers as arguments and returns the sum of the squares of the two larger numbers.
write a grading program for a class with the following grading polices: a.there are two quizzes eaxh graded on the basis of 10 points b.there is ome midterm exam and one final exam
source code
The files are meteorological radar data whose decompression is badly needed for relative study. Please contact Kathy Lee (Email: ; Cell phone: 0086 15701799056) or Mr. Zhu (Email:
Can a copy constructor admit an object of the similar class as parameter, rather than reference of the object?
A: No. If they're utilized properly, they increase encapsulation. You frequently require splitting a class in half while the two halves will have distinct numbers of instances o
F u nction overloading: Functions can be defined with same name. Depending upon the type of argument passed the function will perform. This is known function overloading
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