|
|
|
|
|
|
|
LISTING 14.6 AN ASSIGNMENT OPERATOR |
|
|
|
 |
|
|
|
|
1: // Listing 14.6
2: // Copy constructors
3:
4: #include <iostream.h>
5:
6: class CAT
7: {
8: public:
9: CAT(); // default constructor
10: // copy constructor and destructor elided!
11: int GetAge() const { return *itsAge; }
12: int GetWeight() const { return *itsWeight; }
13: void SetAge(int age) { *itsAge = age; }
14: CAT operator=(const CAT &);
15:
16: private:
17: int *itsAge;
18: int *itsWeight;
19: };
20:
21: CAT::CAT()
22: {
23: itsAge = new int;
24: itsWeight = new int;
25: *itsAge = 5;
26: *itsWeight = 9;
27: }
28:
29:
30: CAT CAT::operator=(const CAT & rhs)
31: {
32: if (this == &rhs)
33: return *this;
34: delete itsAge;
35: delete itsWeight;
36: itsAge = new int;
37: itsWeight = new int;
38: *itsAge = rhs.GetAge();
39: *itsWeight = rhs.GetWeight();
40: return *this;
41: }
42:
43:
44: int main()
45: {
46: CAT frisky;
47: cout << frisky's age: << frisky.GetAge() << endl; |
|
|
|
|
|
|
|
|
continues |
|
|
|
|
|