Answer Posted / rdl

Namespaces allow to group entities like classes, objects
and functions under a name. This way the global scope can
be divided in "sub-scopes", each one with its own name.
The format of namespaces is:
namespace identifier
{
entities
}
Where identifier is any valid identifier and entities is
the set of classes, objects and functions that are included
within the namespace. For example:
namespace myNamespace
{
int a, b;
}
In this case, the variables a and b are normal variables
declared within a namespace called myNamespace. In order
to access these variables from outside the myNamespace
namespace we have to use the scope operator ::. For
example, to access the previous variables from outside
myNamespace we can write:
myNamespace::a
myNamespace::b

The functionality of namespaces is especially useful in the
case that there is a possibility that a global object or
function uses the same identifier as another one, causing
redefinition errors. For example:
// namespaces
#include <iostream>
using namespace std;
namespace first
{
int var = 5;
}
namespace second
{
double var = 3.1416;
}
int main () {
cout << first::var << endl;
cout << second::var << endl;
return 0;
}
5
3.1416
In this case, there are two global variables with the same
name: var. One is defined within the namespace first
and the other one in second. No redefinition errors happen
thanks to namespaces.

What is constructor overloading in oop?

607

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What is overloading and its types?

615

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assume the program must insert 4 elements from the key board and then do the following programs.sequential search(search one of the elements),using insertion sort(sort the element) and using selection sort(sort the element).

1662

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#include #include #include #include void insert(struct btreenode **, int); void inorder(struct btreenode *); struct btreenode { struct btreenode *leftchild; struct btreenode *rightchild; int data; }; main() { struct btreenode *bt; bt=(struct btreenode *)NULL; int req,i=1,num; clrscr(); printf("Enter number of nodes"); scanf("%d",&req); while(i<=req) { printf("Enter element"); scanf("%d",&num); insert(&bt,num); i++; } inorder(bt); } void insert(struct btreenode **sr, int num) { if(*sr==NULL) { *sr=(struct btreenode *)malloc (sizeof(struct btreenode)); (*sr)->leftchild=(struct btreenode *)NULL; (*sr)->rightchild=(struct btreenode *)NULL; (*sr)->data=num; return; } else { if(num < (*sr)->data) insert(&(*sr)->leftchild,num); else insert(&(*sr)->rightchild,num); } return; } void inorder(struct btreenode *sr) { if(sr!=(struct btreenode *)NULL) { inorder(sr->leftchild); printf("\n %d",sr->data); inorder(sr->rightchild); } else return; } please Modify the given program and add two methods for post order and pre order traversals.

3248

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What is interface in oop?

662

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What do you mean by overloading?

580

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c++ program to swap the objects of two different classes

1761

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Why do while loop is used?

576

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What is the main purpose of inheritance law?

667

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What does and I oop and sksksk mean?

650

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What is abstraction with example?

607

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INSTANCE FIELDS DECLARED private ARE ACCESSIBLE BY THE METHODS ONLY.CAN WE CHANGE THE private FIELD OF AN OBJECT IN A METHOD OF SOME OTHER OBJECT OF THE SAME CLASS?

1634

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What makes a language oop?

597

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Are polymorphisms mutations?

702

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What is the diamond problem in inheritance?

578

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