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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class Student {
  5. private:
  6.     int roll;
  7.     string name;
  8.     float cgpa;
  9.  
  10. public:
  11.     // Default constructor
  12.     Student() {
  13.         roll = 11130;
  14.         name = "Fahim";
  15.         cgpa = 3.45;
  16.     }
  17.  
  18.     // ✅ Copy constructor
  19.     Student(Student &obj) {
  20.         roll = obj.roll;
  21.         name = obj.name;
  22.         cgpa = obj.cgpa;
  23.     }
  24.  
  25.     // Display function
  26.     void display() {
  27.         cout << "Roll: " << roll << endl;
  28.         cout << "Name: " << name << endl;
  29.         cout << "CGPA: " << cgpa << endl;
  30.     }
  31. };
  32.  
  33. int main() {
  34.     Student s1;        // default constructor
  35.     Student s2 = s1;   // ✅ copy constructor called
  36.  
  37.     cout << "Student 1:\n";
  38.     s1.display();
  39.  
  40.     cout << "\nStudent 2 (Copied):\n";
  41.     s2.display();
  42.  
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0.01s 5320KB
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stdin
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Standard input is empty
stdout
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Student 1:
Roll: 11130
Name: Fahim
CGPA: 3.45

Student 2 (Copied):
Roll: 11130
Name: Fahim
CGPA: 3.45
https://ideone.com/A1Zoux
language:
C++ (gcc 8.3)
created:
14 hours ago
visibility:
public

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