Try it Yourself

1) Determine the output of the 'C++' Codelet.  
            class base
            { 
            public :
                        out()
                        {
                                    cout<<"base "; 
                        } 
            };
            class deri{
            public : out()
            {
            cout<<"deri ";
            }  
            };
            void main()
            {          deri dp[3];
                        base *bp = (base*)dp;
                        for (int i=0; i<3;i++)
                        (bp++)->out();
            }

1. Justify the use of virtual constructors and destructors in C++.

 

1. Each C++ object possesses the 4 member fns,(which can be declared by the programmer explicitly or by the implementation if they are not available). What are those 4 functions?

1.  What is wrong with this class declaration?

            class something
            {
                        char *str;
                        public:
                           something(){
                           st = new char[10]; }
                          ~something()
                          {
                                    delete str;
                          }
             };

5) Inheritance is also known as -------- relationship. Containership as   ________ relationship.

6)  When is it necessary to use member-wise initialization list  (also known as header initialization list) in C++?

7) Which is the only operator in C++ which can be overloaded but NOT inherited.

8) Is there anything wrong with this C++ class declaration?
            class temp
            {
              int value1;
              mutable int value2;
              public :
                        void fun(int val)
                        const{
                        ((temp*) this)->value1 = 10;
                        value2 = 10;
                        }
             };