WEBVTT 00:00.780 --> 00:06.720 I want to formally go over e design approach that we've actually done before in the first game. 00:06.900 --> 00:09.660 It's called top down design. 00:09.870 --> 00:15.920 It's an approach that takes a problem and breaks it down into smaller problems. 00:16.110 --> 00:21.090 Then we take the smaller problems and break them down and so on. 00:21.090 --> 00:24.440 So the way I like to think that is this way. 00:24.510 --> 00:29.180 So we first solve the problem in a high level way. 00:29.190 --> 00:34.970 So for a number Yessiree if you remember I did something like this. 00:35.170 --> 00:43.370 While this is an actual code this just kind of pseudo code to in 00:47.830 --> 00:52.350 in is said in here it's like play a game or something right. 00:53.330 --> 01:02.770 So here this is a very high level of abstraction but it solves the entire problem. 01:02.930 --> 01:03.470 Right. 01:03.530 --> 01:08.330 You do play the game while you want to play again. 01:08.410 --> 01:08.970 Right. 01:09.230 --> 01:12.770 So this kind of solves the entire problem but there's no detail. 01:12.830 --> 01:23.160 And so this is a very like I said high level of abstraction then what you do is whatever step you can't 01:23.160 --> 01:32.040 write it like concretely like actual code for example like this is an actual code is a whole bunch of 01:32.040 --> 01:33.510 steps right. 01:33.720 --> 01:38.400 We take these these steps and break them down even more. 01:38.400 --> 01:41.430 So for example I'd have some kind of play game 01:45.490 --> 01:48.500 this and this isn't code. 01:48.850 --> 01:50.890 And how would you play the game. 01:50.900 --> 01:56.210 Well maybe you initialize the game for us. 01:57.320 --> 02:11.300 And then you go through the game say do while again while the game is over say game is over. 02:13.380 --> 02:24.380 And inside the while loop you say maybe get the input or maybe prompt the user for something prompt 02:24.380 --> 02:25.300 the player maybe 02:30.890 --> 02:39.250 and you get the input and then you maybe update the game somehow and then you draw the game say 02:42.820 --> 02:53.070 so these are all just high level steps that you can have and then we're not quite done. 02:53.070 --> 02:56.910 We have still the want to play again. 02:56.960 --> 03:01.740 We've already done this before but just for completeness sake. 03:01.930 --> 03:11.800 A An you would say prompt easier. 03:11.910 --> 03:12.720 But it's 03:16.220 --> 03:18.450 in return true. 03:19.670 --> 03:24.300 The user wanted to play again. 03:24.410 --> 03:26.630 OK so you're just high level steps. 03:26.750 --> 03:32.110 So notice that here this solves the problem at this level of abstraction. 03:32.120 --> 03:36.350 So this very first step solves the entire problem. 03:36.350 --> 03:49.270 And then this this is kind of step two so me just say Step 1 and step 2 both play a game and want to 03:49.270 --> 03:50.550 play again or step two. 03:50.550 --> 03:51.100 Right. 03:51.370 --> 03:56.360 And then you'd break the problem down even in two more steps. 03:56.700 --> 03:57.600 Step Three. 03:57.600 --> 04:00.250 Break down all of that. 04:00.320 --> 04:08.310 So initialize the game prompt the user for input get the input of the game draw the game. 04:08.360 --> 04:09.340 Cetera right. 04:09.480 --> 04:15.260 So you kind of break all these down into into step three. 04:15.320 --> 04:18.980 Same with want to play again you'd break prompt the user. 04:19.000 --> 04:22.210 Break down get the input and then break down. 04:22.450 --> 04:23.280 Return true. 04:23.290 --> 04:24.260 These are one to play. 04:24.400 --> 04:25.060 Right. 04:25.090 --> 04:30.190 So and then each one of these will become a function. 04:30.190 --> 04:34.080 So this is a function like we did before and number Gessner. 04:34.290 --> 04:37.430 So this would be a function and then this would be a function. 04:37.900 --> 04:44.050 And you just keep breaking things down until you can actually write it concretely into actual steps 04:44.050 --> 04:47.060 of code. 04:47.110 --> 04:55.180 So once you've kind of done all of these steps then you would go back and just make these functions 04:55.180 --> 04:58.900 and then write all the concrete code in one of the later steps. 04:58.910 --> 05:05.740 And just like we did with number Gasser it's all kind of this is what we're going to do with hangman 05:05.740 --> 05:11.910 next and we'll do it right after we actually go through the problem itself.