c 2b 2b copy constructor

1// Copy constructor 
2    Point(const Point &p2) {x = p2.x; y = p2.y; } 
3  
4    int getX()            {  return x; } 
5    int getY()            {  return y; } 
6}; 

1/*
2 * The copy constructor in C++ is used to construct one object based on another.
3 * Specifically, a 'deep' copy is made, such that any heap-allocated memory
4 * is copied fresh. Thus, the copied-to object doesn't rely on the copied-from
5 * object after the constructor is called.
6 *
7 * The copy constructor is called as follows:
8 * 
9 *  Array a; 
10 *  // ... put data in a ...
11 *  Array b(a); 
12 *
13 * See below for implementation details. 
14 */
15
16/*
17 * Function:   Example copy constructor for an Array class.
18 * Parameters: An Array to make a deep copy of
19 * Effects:    This is now a deep copy of other
20 * Notes:      It's often convenient to use a 'copy' function, as this is also done in the =operator overload.
21 */
22Array::Array(const Array& other) {
23    copy(other);         // make a deep copy of all memory in 'other' to 'this'
24}
25
26/*
27 * Function:   copy
28 * Parameters: An array to make a deep copy of
29 * Returns:    None
30 * Effects:    Makes a deep copy of other into this. 
31 */
32void Array::copy(const Array& other) {
33	for (int = 0; i < other.len; i++) {
34     	this->data[i] = other.data[i]; 
35    }
36  	this->len = other.len;
37}
38