Programming in Modern C++ | Week 6

4 weeks ago
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Session: JULY-DEC 2023

Course Name: Programming in Modern C++

Course Link: Click Here

These are Nptel Programming in Modern C++ Assignment 6 Answers

Programming

Question 1
Consider the following program. Fill in the blanks as per the instructions given below:
   • Complete the destructor statement,
   • Complete the constructor statement,
such that it will satisfy the given test cases

Solution:

#include<iostream>
using namespace std;
class B{
public:
    B(){ cout << "1 "; }
    B(double n){ cout << n << " "; }

    virtual ~B();
};

class D : public B{
public:

    D(double n) : B(n)

These are Nptel Programming in Modern C++ Assignment 6 Answers

Question 2
Consider the following program. Fill in the blanks as per the instructions given below.
   • at LINE-1, define fun as pure abstract function,
   • at LINE-2, complete constructor definition,
   • at LINE-3, complete constructor definition,
such that it will satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class Test{
public:
    virtual void fun()=0; //Line-1
};
class ReTest1 : public Test{
    int d1;
public:
    ReTest1(int n) : d1(n*2){ } //Line-2
    void fun();
};
class ReTest2 : public Test{
    int d2;
public:
    ReTest2(int n) : d2(n*3){ } //Line-3
    void fun(){
        cout << d2 << " ";
    }
};

These are Nptel Programming in Modern C++ Assignment 6 Answers

Question 3
Consider the following program. Fill in the blanks as per the instructions given below.
   • at LINE-1, declare the function show() as pure virtual function,
   • at LINE-2, with appropriate function call,
   • at LINE-3, with appropriate function header,
such that it will satisfy the given test cases.

Solution:

#include <iostream>
using namespace std;
class shape{
protected:
    int a,b;
    shape(int x, int y) : a(x), b(y) {}
public:
    virtual void show() = 0;    //LINE-1
};
class triangle : public shape{
public:
    triangle(int x, int y) : shape(x,y){}
    void Area();
    void show(){
        cout << a + b << " "; //LINE-2
        Area();
    }
};
void shape::show(){ //LINE-3
    cout << a+b << " ";
}

These are Nptel Programming in Modern C++ Assignment 6 Answers

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These are Nptel Programming in Modern C++ Assignment 6 Answers

Quiz

Q1. Consider the following code segment.
What will be the output?
a) 13
b) 14
c) 23
d) 24

Answer: b) 14

Q2. Consider the following code segment.
What will be the output/error?
a) 10 6
b) 10 4
c) 8 6
d) 8 4

Answer: a) 10 6

These are Nptel Programming in Modern C++ Assignment 6 Answers

Q3. Consider the following code segment.
What will be the output?
a) ABC ~C ~B ~A
b) ABC ~C ~B
c) ABC~B~A
d) ABC ~A

Answer: d) ABC ~A

Q4. Consider the following code segment.
Which line/s will give you error?
a) LINE-1
b) LINE-2
c) LINE-3
d) LINE-4

Answer: b, c

These are Nptel Programming in Modern C++ Assignment 6 Answers

Q5. Consider the following code segment.
Which line/s will give you error?
a) LINE-1
b) LINE-2
c) LINE-3
d) LINE-4

Answer: a, d

Q6. Consider the following code segment.
What will be the output?
a) A::f(0) B::g() C::h()
b) C::f() C::g() B::h()
c) C::f() B::g() B::h()
d) C::f() C::g() C::h()

Answer: b) C::f() C::g() B::h()

These are Nptel Programming in Modern C++ Assignment 6 Answers

Q7. Consider the following code segment.
Fill in the blank at LINE-1 so that the program will print 2.
a) cb->B::fun()
b) B::fun()
c) B::cb->fun()
d) cb->fun()

Answer: a) cb->B::fun()

Q8. Consider the following code segment.
Identify the abstract classes.
a) Vehicle, Car, MotorCycle
b) Vehicle, Car, SUV
c) Vehicle, Car
d) Vehicle, Car, SportsCar, SUV

Answer: d) Vehicle, Car, SportsCar, SUV

These are Nptel Programming in Modern C++ Assignment 6 Answers

Q9. Consider the following code segment.
What will be the output?
a) 0
b) 1
c) 2
d) Garbage

Answer: a) 0

Programming Assignment of Programming in Modern C++

Question 1

Complete the program with the following instructions.
  • Fill in the blank at LINE-1 with proper access specifier.
  • Fill in the blanks at LINE-2 to declare area() as a pure virtual function.
The program must satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class Shape
{
  protected:
  double ar;
  public:
  virtual void area()=0;
  void show()
  {
    cout << ar << " ";
  }
};

These are Nptel Programming in Modern C++ Assignment 6 Answers

Question 2

Consider the following program with the following instructions.
  • Fill in the blank at LINE-1 with appropriate destructor declaration.
  • Fill in the blank at LINE-2 with appropriate initialization list of derived class constructor.
The program must satisfy the sample input and output.

Solution:

#include<iostream>
using namespace std;
class Base
{
  public:
  Base()
  {
    cout << "1 ";
  }
  Base(int n)
  {
    cout << n << " ";
  }
  virtual ~Base()
  {
    cout << "2 ";
  };
};
class Derived : public Base
{
  int num;
  public:
  Derived()
  {
    cout << "3 ";
  }
  Derived(int n) : Base(n), num(n*3)
  {
    cout << num << " ";
  }
  virtual ~Derived()
  {
    cout << "4 ";
  }
};

These are Nptel Programming in Modern C++ Assignment 6 Answers

Question 3

Consider the following program. Fill in the blanks as per the instructions given below:
  • Fill in the blanks at LINE-1 with an appropriate keyword.
  • Fill in the blank at LINE-2 with an appropriate function declaration.
  • Fill in the blank at LINE-3 with an appropriate statement.
such that it will satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class B
{
  protected:
  int s;
  public:
  B(int i=0) : s(i)
  {}
  virtual ~B()
  {}
  virtual int fun(int x)=0;
};
class D : public B
{
  public:
  D(int i) : B(i)
  {}
  ~D();
  int fun(int x)
  {
    return s+x;
  }
};
class Z
{
  public:
  void fun(int a, int b)
  {
    B *t = new D(a);
    int i = t->fun(b);
    cout << i << " ";
    delete t;
  }
};

These are Nptel Programming in Modern C++ Assignment 6 Answers

These are Nptel Programming in Modern C++ Assignment 6 Answers

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These are Nptel Programming in Modern C++ Assignment 6 Answers

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