dcsimg
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: C++
Expertise: Beginner
Apr 25, 2005

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Converting One Class Type to a Different Class Type

There are two ways to convert the objects between two different class types.
  1. Define a constructor in the target class, which takes an argument from the source class type:
    
    class source; // forward declaration
    
    class target
    {
       public :
       target():m_str("WebSite")
       {}
       target (const source& src);
       string m_str;
    };
    
    class source
    {
       public:
       source () : m_ch(new char[5])
       {
       strcpy (m_ch, "DevX");
       }
    
       char* m_ch;
    };
    
    target ::target (const source& src) : m_str(src.m_ch)
    {}
    
    int main ()
    {
       source s;
       target t;
       cout << t.m_str << '\n';
       t = s;					//assigning
       target t_1 = s;			//initializing
       cout << s.m_ch << '\n';
       cout << t.m_str << '\n';
       cout << t_1.m_str << '\n';
       return 0;
    }
    
  2. Define a conversion function of the target class type in the source class. Don't define both, because doing so causes ambiguity for the compiler.
    
    class target
    {
       public:
       public :
       target():m_str("WebSite")
       {}
       target (const char* ch ) : m_str(ch)
       {}
       string m_str;
    };
    
    class source
    {
       public:
       source () : m_ch(new char[5])
       {
       strcpy (m_ch, "DevX");
       }
    
       operator target ()
       {
       return target (m_ch);
       }
    
       char* m_ch;
    };
    
    int main  ()
    {
       source s;
       target t;
       cout << t.m_str << '\n';
       t = s;                                  //assigning
       target t_1 = s;                 //initializing
       cout << s.m_ch << '\n';
       cout << t.m_str << '\n';
       cout << t_1.m_str << '\n';
       return 0;
       return 0;
    }
    
Saurabh Ramya
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date