Interested to Buy Any Domain ? << Click Here >> for more details...
What is singleton design pattern
- 1 Answers
- 10758 Views
- CSS, Dimdim, Fulcrum Logic, TCS, Wipro, I also Faced
- E-Mail Answers
Answer / lokesh
Singleton design pattern is a a creational pattern to
dictate how and when objects get created and it's main
purpose is to ensure that a class has only one instance
Example:
#define NULL 0
class Singleton
{
private:
Singleton(Singleton&){}
Singleton& operator =(Singleton&);
int nValue;
static Singleton* pSingleton;
Singleton():nValue(10)
{
}
public:
static Singleton*Instance()
{
if(NULL == pSingleton)
{
pSingleton = new Singleton();
}
return pSingleton;
}
void setValue(int val)
{
nValue = val;
}
int getValue()
{
return nValue;
}
};
Singleton* Singleton::pSingleton = NULL;
int main(int argc, char* argv[])
{
Singleton *abc = NULL;
cout<<Singleton::Instance()->getValue()<<endl;
Singleton::Instance()->setValue(20);
Singleton *xyz = NULL;
cout<<xyz->Instance()->getValue()<<endl;
Singleton *sss = Singleton::Instance();
return 0;
}
| Is This Answer Correct ? | 16 Yes | 5 No |
What is onion architecture?
What are the types of design patterns?
. Explain your area of focus.
What is Software development life cycle....??
Which design pattern is mostly used in net?
Using any system, product, or service your organization provides, identify the human system roles for the product.
Explain Inline Style Sheet?
What are the benefits of the proxy in the design pattern?
Explain Internal Style Sheets?
What are the examples of the behavioral design patterns?
Is bean a singleton?
What is the gang of four design pattern?
Design Patterns 
