need to understand the execution of the following code.

Question

this might be a dumb question but i would like to know the working/execution sequence of the following program that have constructor and destructor in it.

#include <iostream>

using namespace std;

class Line {
public:
int getLength( void );
Line( int len ); // simple constructor
Line( const Line &obj); // copy constructor
~Line(); // destructor

private:
int *ptr;
};

// Member functions definitions including constructor
Line::Line(int len) {
cout << "Normal constructor allocating ptr" << endl;

// allocate memory for the pointer;
ptr = new int;
*ptr = len;
}

Line::Line(const Line &obj) {
cout << "Copy constructor allocating ptr." << endl;
ptr = new int;
*ptr = *obj.ptr; // copy the value
}

Line::~Line(void) {
cout << "Freeing memory!" << endl;
delete ptr;
}

int Line::getLength( void ) {
return *ptr;
}

void display(Line obj) {
cout << "Length of line : " << obj.getLength() <<endl;
}

// Main function for the program
int main() {

Line line1(10);

Line line2 = line1; // This also calls copy constructor

display(line1);
display(line2);

return 0;
}