NPTEL Programming In Modern C++ Week11 Assignment Solution 2023


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++ Week11 Programming Assignment July 2023

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

Course Name : Programming In Modern C++ July 2023

Programming Assignment : Q1

Consider the following program (in C++11).
   • Fill in the blanks at LINE-1 and LINE-3 with appropriate template definitions.
   • Fill in the blanks at LINE-2 and LINE-4 to complete the return statements for product functions.
					#include <iostream>

template <typename T>                   //LINE-1

double product(T num){ return num; }    //LINE-2

template <typename T, typename... Tail>   //LINE-3

double product(T num, Tail... nums){ 

    return num * product(nums...);        //LINE-4

int main(){
    int a, b, c;
    double d, e, f;
    std::cin >> a >> b >> c;
    std::cin >> d >> e >> f;
    std::cout << product(a, b, c) << " ";
    std::cout << product(d, e, f) << " ";
    std::cout << product(a, b, c, d, e, f);
    return 0;

Course Name : Programming In Modern C++ July 2023

Programming Assignment : Q2

Consider the program below (in C++11).
   • Fill in the blank at LINE-1 with appropriate template declaration.
   • Fill in the blanks at LINE-2 with an appropriate universal reference type parameter for constructor of class derived and an the appropriate call forwarding to the base class constructor.
					#include <iostream>
class base {
        base(const int& n) : n_(n * 10){ std::cout << "lvalue : " << n << ", "; }
        base(int&& n) : n_(n * 20) { std::cout << "rvalue : " << n << ", "; }
        int n_;

class derived : public base {
        template<typename T>                            //LINE-1

        derived(T&& n) : base(std::forward<T>(n)) { }        //LINE-2

        void show(){ std::cout << n_ << " "; }

int main(){
    int i;
    std::cin >> i;
    derived obj1(i);
    derived obj2(std::move(i));;;
    return 0;

Course Name : Programming In Modern C++ July 2023

Programming Assignment : Q3

Consider the following program that implements a recursive lambda function to find the sum of the digits of an input integer.
   • Fill in the blank at LINE-1 to declare the signature of revPrint as std::function.
   • Fill the blank at LINE-2 to complete the definition of lambda function revPrint.

int main() {
    std::function<int(int)> revPrint;    //LINE-1

    revPrint = [&revPrint](int n) -> int {     //LINE-2

        if (n == 0)
            return 0;
        return n % 10 + revPrint(n /= 10);
int a;
    std::cin >> a;
    std::cout << revPrint(a);