IGNOU BCSL 32 2026 2027 - Use appropriate constructors to initialize objects and demonstrate the

Question

Use appropriate constructors to initialize objects and demonstrate the use of both default and parameterized constructors in your program. Make assumptions, if necessary

07 Aug 2026

Answer :

Word Count : 989

Constructors are special member functions of a C++ class that are automatically invoked when an object of the class is created. They are mainly used to initialize the data members of an object. A constructor has the same name as the class and does not have a return type, not even `void`. C++ supports different types of constructors, among which default and parameterized constructors are commonly used. A default constructor initializes an object without receiving any arguments, whereas a parameterized constructor receives arguments and initializes an object with specific values. The following C++ program demonstrates the use of both default and parameterized constructors. The program assumes a `Student` class containing three data members: student name, roll number, and marks. ```cpp #include #include using namespace std; class Student { private: string name; int rollNo; float marks; public: // Default constructor Student() { name = "Unknown"; rollNo = 0; marks = 0.0; } // Parameterized constructor Student(string n, int r, float m) { name = n; rollNo = r; marks = m; } // Function to display student details void display() { cout << "Name: " << name << endl; cout << "Roll Number: " << rollNo << endl; cout << "Marks: " << marks << endl; cout << "------------------------" << endl; } }; int main() { // Object created using default constructor Student student1; // Object created using parameterized constructor Student student2("Rahul", 101, 85.5); // Another object using parameterized constructor Student student3("Priya", 102, 91.0); cout << "Details of Student 1:" << endl; student1.display(); cout << "Details of Student 2:" << endl; student2.display(); cout << "Details of Student 3:" << endl; student3.display(); return 0; } ``` In this program, the `Student` class contains three private data members: `name`, `rollNo`, and `marks`. These members represent the basic information associated with a student. The class also contains two constructors and one member function named `display()`. The first constructor is the default constructor: ```cpp Student() { name = "Unknown";

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