#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 line(10);
display(line);
return 0;
}
原创文章,作者:ItWorker,如若转载,请注明出处:https://blog.ytso.com/tech/pnotes/265506.html