What is an adaptor class or Wrapper class? C++

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A class that has no functionality of its own. Its member functions hide the use of a third party software component or an object with the non-compatible interface or a non-object-oriented implementation.

2012-01-09, 2600👍, 0💬

What is the use of ‘using’ declaration. C++
What is the use of ‘using’ declaration. C++ A using declaration makes it possible to use a name from a namespace without the scope operator. 2012-01-05, 2856👍, 0💬

What is a Null object? C++
What is a Null object? C++ It is an object of some class whose purpose is to indicate that a real object of that class does not exist. One common use for a null object is a return value from a member function that is supposed to return an object with some specified properties but cannot find such an... 2012-01-10, 2790👍, 0💬

What is an incomplete type? C++
What is an incomplete type? C++ Incomplete types refers to pointers in which there is non availability of the implementation of the referenced location or it points to some location whose value is not available for modification. int *i=0x400 // i points to address 400 *i=0; //set the value of memory... 2012-01-06, 2771👍, 0💬

What do you mean by Stack unwinding? C++
What do you mean by Stack unwinding? C++ It is a process during exception handling when the destructor is called for all local objects between the place where the exception was thrown and where it is caught. 2012-01-11, 2733👍, 0💬

What is class invariant? C++
What is class invariant? C++ A class invariant is a condition that defines all valid states for an object. It is a logical condition to ensure the correct working of a class. Class invariants must hold when an object is created, and they must be preserved under all operations of the class. In partic... 2012-01-10, 2709👍, 0💬

Differentiate between the message and method. C++
Differentiate between the message and method. C++ Message: * Objects communicate by sending messages to each other. * A message is sent to invoke a method. Method * Provides response to a message. * It is an implementation of an operation. 2012-01-09, 2657👍, 0💬

What is an Iterator class? C++
What is an Iterator class? C++ A class that is used to traverse through the objects maintained by a container class. There are five categories of iterators: input iterators, output iterators, forward iterators, bidirectional iterators, random access. An iterator is an entity that gives access to the... 2012-01-05, 2636👍, 0💬

What is a dangling pointer? C++
What is a dangling pointer? C++ A dangling pointer arises when you use the address of an object after its lifetime is over. This may occur in situations like returning addresses of the automatic variables from a function or using the address of the memory block after it is freed. The following code ... 2012-01-06, 2628👍, 0💬

What are the conditions that have to be met for a condition to be an invariant of the class?
What are the conditions that have to be met for a condition to be an invariant of the class? * The condition should hold at the end of every constructor. * The condition should hold at the end of every mutator (non-const) operation. 2012-01-12, 2618👍, 0💬

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