demonstrate constructor

#include <iostream>

class MyClass {
public:
  int myNum;   // Declare an integer variable

  // Constructor with a parameter
  MyClass(int x) {
    myNum = x;  // Initialize myNum with the value of x
  }
};

int main() {
  // Create an object of MyClass
  MyClass obj1(42);
  std::cout << obj1.myNum << std::endl;  // Output the value of myNum
  return 0;
}