NPTEL Programming In Modern C++ Week 3 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 3 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

Consider the program below which defines a class Complex.
Complete the program with the following instructions.
• Fill in the blank at LINE-1 to complete parameterized constructor.
• Fill in the blank at LINE-2 to complete copy constructor.
• Fill in the blank at LINE-3 and LINE-4 to complete the sum function.
using namespace std;
class Complex{
    const int x,y;
    Complex(int _x=0, int _y=0) : x(_x), y(_y) {} //LINE-1

    Complex(const Complex& c) : x(c.x), y(c.y) {} //LINE-2

    void sum(Complex p){
        int rx = x+p.x; //LINE-3

        int ry = y+p.y; //LINE-4
         cout << "(" << rx << "," << ry << ")" << endl;
    void print(){ cout << "(" << x << "," << y << ")" << endl; }

int main(){
    int x1,x2,y1,y2;
    cin >> x1 >> y1 >> x2 >> y2;
    Complex c1(x1,y1), c2(x2,y2);
    return 0;

Programming Assignment Q2

Consider the following program.
• Fill in the blanks at LINE-1 and LINE-2 with an appropriate constructor and destructor
• Fill in the blank at LINE-3 with appropriate header for assignment (=) overload function.
• Fill in the blank at LINE-4 with an appropriate concatenation statement.
  The program must satisfy the sample input and output.
using namespace std;
class Test{
    char *s;
    Test(char *s) : s(s) {}       //LINE-1

    ~Test(){ free(s); }           //LINE-2

    Test& operator=(Test &m){     //LINE-3

        s = strdup(m.s);
        return *this;
    void update(char* x){
      strcat(strcat(s,{" "}),x);     //LINE-4
        void print(){
        cout << s << endl;

int main(){
    string str1, str2;
    cin >> str1 >> str2;
    Test *m1 = new Test(&str1[0]);
    Test *m2 = m1;
    return 0;

Programming Assignment Q3

Consider the following program. Fill in the blanks as per the instructions given below:
• at LINE-1 with appropriate declaration of data member z,
• at LINE-2 with appropriate constructor statement, and
• at LINE-3 and LINE-4 with appropriate header of the functions calcZ() and print(),
  such that it will satisfy the given test cases.
using namespace std;
class Point3D {
    int x, y;
    mutable int z; // LINE-1

    Point3D(int x_, int y_) : x(x_*x_), y(y_*y_) { } //LINE-2

    void calcZ() const { z = x * y; }; // LINE-3

    void print() const { // LINE-4
     cout << "(" << x << "," << y << "," << z << ")";

int main() {
    int i, j;
    cin >> i >> j;
    const Point3D m(i, j);
    return 0;