Pointers

Pointers

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Questions and Answers
Standard Library
  1. What is the meaning of the following declaration?
    int(*p[10])();










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    In this expression, p is array not pointer.

  1. Which is the best design choice for using pointer to member function?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    Interface

  1. What is the output of this program?
    #include <iostream>
        using namespace std;
        class N
        {
            public:
            N(int k = 0){ _k = k;}
            void fun()
            {
                cout << "Program Executed..."<        }
            private:
            int _k;
        };
        int main()
        {
            N *ptr = 0;
            ptr -> fun();
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: A

    In this program, We passes the value to the class and printing it.

  1. What is the output of this program?
    #include <iostream>
        using namespace std;
        class Car 
        {
            public:
            int Lamborghini;
            int Audi;
        };
        int count_CarType(Car * begin, Car * end, int Car :: *CarType)
        {
            int count = 0;
            for (Car * iterator = begin; iterator != end; ++ iterator)
                count += iterator ->* CarType;
            return count;
        }
        int main()
        {
            Car CarArray[5] = {{ 4, 2 },{ 6, 1 }};
            cout << "I have " << count_CarType(CarArray, CarArray + 2, & Car :: Lamborghini) << " Lamborghini.\n";
            cout << "And I have " << count_CarType(CarArray, CarArray + 2, & Car :: Audi) << " Audi.";
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    In this program, We are passing the value to the class and adding the values and printing it in the main.

  1. What is the output of this program?
    #include <iostream>
        using namespace std;
        class Lamborghini
        {
            public:
            int speed;
        };
        int main()
        {
            int Lamborghini :: *ptrSpeed = &Lamborghini :: speed;
            Lamborghini obj;
            obj.speed = 4;           
            cout << obj.speed << endl;
            obj.*ptrSpeed = 5;     
            cout  << obj.speed << endl;
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    In this program, We are printing the value by direct access and another one by using pointer to member.