WEBVTT 00:00.600 --> 00:10.530 So there are a couple things I want to do lot done with the number Gasser quite yet in the want to play 00:10.530 --> 00:20.510 again function let's say the user typed in a capital Y instead of lower case y. 00:21.000 --> 00:23.860 Well I want to I want that count. 00:23.940 --> 00:29.310 So I want to be able to say I want that to be yes. 00:29.980 --> 00:38.680 In that case though how I really want to just ignore the chaos of character k. 00:38.860 --> 00:45.680 So you have an ELSE case here and I'm going to say 00:48.290 --> 00:54.360 well some is going nor anything else. 00:55.640 --> 01:01.000 Here. 01:01.100 --> 01:07.780 So say they pressed Y and then like a bunch of other stuff that would still work. 01:07.850 --> 01:08.570 In this case 01:12.120 --> 01:13.230 that's why I'm doing that. 01:13.440 --> 01:24.700 And now I want to check to see well not check but I want to ignore the if it's a y uppercase Y or lowercase 01:24.700 --> 01:39.330 YS How you do that is through this function call to to lower. 01:39.740 --> 01:51.510 To lower takes a character and to learn as part of the CC type header. 01:51.530 --> 01:54.310 So we need to include that as well. 01:56.950 --> 01:58.350 CC type 02:01.680 --> 02:08.360 and this will actually put any input that they set to lower case. 02:09.460 --> 02:17.770 So now if we run it again and let's just say no it is 5. 02:17.830 --> 02:25.290 So would you like to play again this type in the capital Y and then it works OK. 02:27.020 --> 02:31.180 And just for checking lowercase. 02:31.180 --> 02:37.750 Still it works and anything else of course will not. 02:37.980 --> 02:41.830 OK so I just want to fix that quickly. 02:44.030 --> 02:54.650 Now we need to finish the part of the game that said it should change based on 02:59.040 --> 03:00.890 the numbers change each time. 03:01.110 --> 03:01.740 OK. 03:02.700 --> 03:10.960 So how we're going to do that is in fact we need another include here 03:14.310 --> 03:15.210 include 03:18.010 --> 03:31.790 the fact we eat to standard lib h in are going to include something called seedtime K.. 03:32.050 --> 03:37.120 And what we're going to use is a random number generator. 03:37.150 --> 03:47.240 So how this random number generator works is we first have to seed the right number generator. 03:47.370 --> 03:52.780 So it has to have a defaults value. 03:54.370 --> 04:03.940 And to use unsigned int and a time function z time library call time. 04:03.940 --> 04:07.560 This just gets the current time. 04:07.570 --> 04:09.470 So just now basically. 04:09.580 --> 04:10.330 OK. 04:10.510 --> 04:13.530 And it doesn't really matter what I use here. 04:13.540 --> 04:21.790 I could just use 0 say but random numbers aren't truly random on computers. 04:21.820 --> 04:24.290 It kind of work based on this seed. 04:24.580 --> 04:31.540 So depending on the seed you give it it'll give different random numbers. 04:32.300 --> 04:40.540 So we have to see the random number generator generator first and then we can get random numbers later. 04:40.870 --> 04:47.540 So now we want to get the random number. 04:47.540 --> 04:59.240 So how you do that is a Rand parentheses like this and this will give you a number believe it's from 05:00.490 --> 05:03.590 zero to Rand Max. 05:03.590 --> 05:04.550 OK. 05:04.930 --> 05:11.200 So but we want it to be from 0 to our upper bound. 05:11.200 --> 05:21.440 So all we have to do is a modulus for bound like this. 05:21.690 --> 05:22.690 OK. 05:23.080 --> 05:26.550 In fact we do. 05:26.730 --> 05:37.240 Now we get like so now you're in this again and we say 65 it's probably not going to be 65. 05:37.240 --> 05:39.240 That was too high. 05:39.630 --> 05:48.610 So let's try to get say 30 is too high will say 15. 05:55.220 --> 05:56.920 Too low. 05:56.950 --> 06:02.710 So we'll say when he fight. 06:02.800 --> 06:04.550 Twenty three years. 06:04.970 --> 06:05.670 Oh yeah. 06:05.680 --> 06:06.710 It's 23. 06:06.800 --> 06:09.950 And he don't want to play it. 06:10.260 --> 06:15.710 So there are some fixes for our game. 06:15.780 --> 06:31.840 So Rand really gives you a random number between 0 and Rand Max and the CC type which is down here to 06:31.840 --> 06:38.320 the two lowers So basically makes any character into a lowercase character. 06:38.490 --> 06:42.710 And so that's it for this game. 06:42.730 --> 06:48.760 So in the next section we're going to start talking about some interesting things called pointer's.