WEBVTT 00:00.430 --> 00:01.690 Hello, my name is Typhoon. 00:01.690 --> 00:07.920 And in this lecture of our oxide course, we will learn about the another necessary requirement of ADT 00:07.960 --> 00:08.380 here. 00:08.380 --> 00:10.030 So let's get started. 00:22.260 --> 00:30.900 Another requirement of ADT is that it has to be able to control all copy operations to avoid dynamic 00:30.900 --> 00:34.350 memory aliasing problems caused by a shallow copy. 00:34.350 --> 00:38.490 So some members of the copy may reference the same objects as the original. 00:38.490 --> 00:43.590 So for this purpose we can use the assignment operator overloading as the sample. 00:43.590 --> 00:48.150 We will refactor the dog class so it now has the copy assignment. 00:48.150 --> 00:48.510 Operator. 00:48.510 --> 00:54.690 So the code here we will write now is inside the dog class. 00:54.690 --> 00:58.230 We have the public, the constructor here. 00:59.120 --> 01:03.680 As you can see here, and we are class dog animal. 01:03.680 --> 01:08.720 So we will forward the forward forward to the constructor arguments. 01:08.720 --> 01:13.250 And now we're going to create some, uh, assignment operator overloading. 01:13.250 --> 01:17.900 So void operator, void operator here. 01:17.900 --> 01:23.630 And we will make the const dog here and dog. 01:25.200 --> 01:27.240 So under here. 01:29.240 --> 01:32.570 And my name equals the dot. 01:33.170 --> 01:33.950 My name. 01:35.210 --> 01:38.090 So we have the string name. 01:39.090 --> 01:41.520 Is a private member of animal. 01:41.730 --> 01:49.740 So now we will change this my name to protected instead of private. 01:51.250 --> 01:52.620 Take that here. 01:53.280 --> 01:57.600 So as you can see here, error is gone without turning it to public. 01:59.250 --> 02:01.620 Here we write the. 02:03.710 --> 02:04.630 Copy assignment. 02:04.640 --> 02:07.730 Uh, the forward copy assignment operator Overloading here. 02:07.730 --> 02:10.820 This is just a copy assignment overloading. 02:10.820 --> 02:14.690 And now we will implement the interface. 02:15.650 --> 02:18.050 As you can see, the interface is implemented here. 02:18.380 --> 02:22.130 Now let's actually run with the here. 02:22.130 --> 02:24.170 So now we will use a dog. 02:24.170 --> 02:25.970 Dog here, dog. 02:26.150 --> 02:29.990 This is our is going to be here terrier. 02:31.870 --> 02:36.220 And after that see out dog dot get name. 02:37.390 --> 02:39.640 That terrier is barking. 02:40.300 --> 02:42.280 Is barking. 02:47.630 --> 02:53.090 So and see out dog that make sound. 02:53.780 --> 02:54.890 And line. 02:55.070 --> 02:56.090 And line. 02:56.810 --> 02:59.780 So here is going to be the the. 03:01.200 --> 03:03.720 Terrier is barking. 03:03.720 --> 03:07.110 And after that it's going to be woof, woof here. 03:07.380 --> 03:09.540 And after that, we will also create a dog, too. 03:09.570 --> 03:10.080 Here. 03:10.500 --> 03:11.270 Dog. 03:11.280 --> 03:12.210 Dog two. 03:12.210 --> 03:14.730 And here we're going to use the dog here. 03:15.060 --> 03:18.960 As you can see here, this is we are going to take this dog and put it here. 03:19.320 --> 03:21.120 You will see why here. 03:21.240 --> 03:26.310 See out dog two dot get name. 03:26.640 --> 03:28.320 And this is going to be it's. 03:29.860 --> 03:32.800 Is marking is barking here. 03:34.340 --> 03:43.160 And after that see out.to dot make sound and in line. 03:43.940 --> 03:49.220 So we have added the copy assignment operator, which is overloading the doc class. 03:49.220 --> 03:55.490 However, since we try to access the my name variable in the base class from the drive class, we need 03:55.490 --> 03:58.520 to make the my name protected here. 03:58.520 --> 04:02.780 So if we make this private, we will access this outside the class here. 04:02.780 --> 04:06.280 And as you can see here, we need to make it private but not public here. 04:06.290 --> 04:10.190 But not protected, but not public here protected. 04:10.910 --> 04:17.840 So in the main method, when we copy the dog to dog to oops, actually. 04:17.840 --> 04:18.000 Yeah. 04:18.440 --> 04:22.190 The dog to dog to here. 04:24.510 --> 04:24.930 Yeah. 04:24.930 --> 04:32.820 So when we copy the dog to dog two, we can ensure that this is not a shallow copy. 04:33.390 --> 04:35.010 Let's run our program again. 04:35.040 --> 04:35.450 Oops. 04:35.460 --> 04:36.900 Here with this. 04:37.620 --> 04:40.890 And as you can see here, we got the same result. 04:40.890 --> 04:41.100 It's. 04:41.100 --> 04:42.120 Except it's actually. 04:42.120 --> 04:42.480 Yeah. 04:43.620 --> 04:48.280 And as you can see here, this is not a shallow copy. 04:48.300 --> 04:50.190 So in next lecture, I'm waiting you.