C++2007-09-14
const Pointers in C++
You can use the keyword const for pointers before the type, after the type, or in both places. For example, all of the following are legal declarations:
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C++2007-09-14
Stray or Dangling Pointers in C++
One source of bugs that are nasty and difficult to find is stray pointers. A stray pointer is created when you call delete on a pointer--thereby freeing the memory that it points t
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this Pointer in C++
Every class member function has a hidden parameter: the this pointer. this points to the individual object. Therefore, in each call to GetAge() or SetAge(), the this pointer for th
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Dot (.) vs Arrow (->) to access data members in C++
Normally you can access data members and functions by using the dot (.) operator for Cat objects created locally. To access the Cat object on the free store, you must dereference t
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C++ Sample Program for Allocating, using, and deleting pointers.
The program below demonstrates allocating a variable on the heap, using that variable, and deleting it.
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The Stack and the Free Store in C++
Local variables are on the stack, along with function parameters. Code is in code space, of course, and global variables are in global name space. The registers are used for intern
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C++2007-09-14
Manipulating Data by Using Pointers
Once a pointer is assigned the address of a variable, you can use that pointer to access the data in that variable. Program below demonstrates how the address of a local variable i
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The indirection operator (*) - dereference operator.
The indirection operator (*) is also called the dereference operator. When a pointer is dereferenced, the value at the address stored by the pointer is retrieved.
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Storing the Address in a Pointer
Every variable has an address. Even without knowing the specific address of a given variable, you can store that address in a pointer.
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What Is a Pointer in C++?
Pointers present two special challenges when learning C++: They can be somewhat confusing, and it isn't immediately obvious why they are needed. This article introduces how pointer
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3-D Secure Payment or 3DS - (3-Domain Secure Payment)
A 3-D Secure transaction is performed immediately before a merchant performs a payment transaction, that is, Authorisation transaction in the Auth/Capture mode; and the Purchase tr
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What are e-Payments?
e-Payments are secure real time payments that transfer funds (via the Internet) between a consumer and the merchant's financial institutions. e-Payments require secure communicatio
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