NPTEL Programming In Modern C++ Week 7 Programming Assignment


There has been a continual debate on which programming language/s to learn, to use. As the latest TIOBE Programming Community Index for August 2021 indicates – C (13%), Python (12%), C++ (7%), Java (10%), and C#(5%) together control nearly half the programming activities worldwide. Further, C Programming Language Family (C, C++, C#, Objective C etc.) dominate more than 25% of activities. Hence, learning C++ is important as one learns about the entire family, about Object-Oriented Programming and gets a solid foundation to also migrate to Java and Python as needed. C++ is the mother of most general purpose of languages. It is multi-paradigm encompassing procedural, object-oriented, generic, and even functional programming. C++ has primarily been the systems language till C++03 which punches efficiency of the code with the efficacy of OOP. Then, why should I learn it if my primary focus is on applications? This is where the recent updates of C++, namely, C++11 and several later offer excellent depths and flexibility for C++ that no language can match. These extensions attempt to alleviate some of the long-standing shortcomings for C++ including porous resource management, error-prone pointer handling, expression semantics, and better readability. The present course builds up on the knowledge of C programming and basic data structure (array, list, stack, queue etc.) to create a strong familiarity with C++98 / C++03. Besides the constructs, syntax and semantics of C++ (over C), we also focus on various idioms of C++ and attempt to go to depth with every C++ feature justifying and illustrating them with several examples and assignment problems. On the way, we illustrate various OOP concepts. The course also covers important advances in C++ 11 and later released features..

Programming In Modern C++ Week 7 Programming Assignment.

INTENDED AUDIENCE :  Any interested audience
PREREQUISITES :  10th standard/high school
INDUSTRY SUPPORT :  Programming in C++ is so fundamental that all companies dealing with systems as well as application development (including web, IoT, embedded systems) have a need for the same. These include – Microsoft, Samsung, Xerox, Yahoo, Oracle, Google, IBM, TCS, Infosys, Amazon, Flipkart, etc. This course would help industry developers to be up-to-date with the advances in C++ so that they can remain at the state-of-the-art.

Course Layout

Week 1: Programming in C++ is Fun.
Week 2: C++ as Better C.
Week 3: OOP in C++.
Week 4: OOP in C++.
Week 5: Inheritance.
Week 6: Polymorphism.
Week 7: Type Casting.
Week 8: Exceptions and Templates.
Week 9: Streams and STL.
Week 10: Modern C++.
Week 11: Lambda and Concurrency.
Week 12: Move, Rvalue and STL Containers

Programming Assignment Q1

Complete the program with the following instructions:
  • Fill in the blank at LINE-1 to complete the parameterized constructor definition,
  • Fill in the blanks at LINE-2 to complete cast operator overloading function to typecast to IP1 type.
					#include <iostream>
using namespace std;
class IP1 {
    int i;

        IP1(int ai) : i(ai) {}
        int get() const { return i; }
        void update() { i *= 10; }

class IP2 {
    int i;
        IP2(int ai) : i(ai) {}
        int get() const { return i; }

        IP2(IP1& a) : i(a.get()) {} //LINE-1

        operator IP1() { return IP1(i); } //LINE-2

        void update() { i *= 20; }

int main() {
    int i;
    cin >> i;
    IP1 a(i+2);
    IP2 b(i);
    const IP2 &r = static_cast<IP2>(a);
    cout << a.get() << ":";    
    cout << r.get() << ":";
    const IP1 &s = static_cast<IP1>(b);
    cout << b.get() << ":";
    cout << s.get() << ":";
    return 0;

Programming Assignment Q2

Consider the following program with the following instructions.
  • Fill in the blank at LINE-1 to complete assignment operator overload function header.
  • Fill in the blanks at LINE-2 and LINE-3 to complete statements with the appropriate casting operator.
using namespace std;
class myClassA{
    int a = 5;

        void print(){
            cout << a << " ";

class myClassB{
    int b = 10;
        void print(){
            cout << b;

        myClassB operator=(int x){ //LINE-1
            b = b * x;
void fun(const myClassA &t){
    int x;
    cin >> x;
    myClassA &u = const_cast<myClassA&>(t); //LINE-2
    myClassB &v = reinterpret_cast<myClassB&>(u); //LINE-3
    v = x;

int main(){
    myClassA t1;
    return 0;

Programming Assignment Q3

Consider the following program. Fill in the blanks as per the instructions given below:
  • at LINE-1 to complete the constructor definition,
  • at LINE-2 to complete char* operator overload function header
using namespace std;
class String{
    char* _str;

    String (char* str) : _str(str){} //LINE-1

    operator char *(){ //LINE-2

        char* t_str = (char*)malloc(sizeof(_str) + 7);
        strcpy(t_str, "Welcome ");
        strcat(t_str, _str);
        return t_str;

int main(){
    char s[15];
    cin >> s;
    String st = static_cast<String>(s);
    cout << static_cast<char*>(st);
    return 0;