(Game: heads or tails) Write a program that lets the user...

Name: Problem 14, Chapter 3: Introduction to Java Programming
Uploaded: 2022-04-01T20:19:11-08:00
Duration: 9 min 13 s
Channel: Harriet O'Brien
Description: (Game: heads or tails) Write a program that lets the user guess whether the flip of a coin results in heads or tails. The program randomly generates an integer 0 or 1 which represents head or tail. The program prompts the user to enter a guess and reports whether the guess is correct or incorrect.

(Game: heads or tails) Write a program that lets the user guess whether the flip of a coin results in heads or tails. The program randomly generates an integer 0 or 1 which represents head or tail. The program prompts the user to enter a guess and reports whether the guess is correct or incorrect.

Key Concepts

User Input and Output

User input and output are fundamental in interactive software, allowing programs to collect data from users and display results accordingly. This interaction enables the execution of decisions or actions based on user-provided information.

Conditional Statements

Conditional statements are structural programming constructs that enable the execution of different code blocks depending on whether certain conditions are met. They are essential for decision-making processes in programs, allowing for appropriate responses based on varying inputs.

Random Number Generation

Random number generation is a key concept in programming used to produce numbers without a predictable pattern. It allows programs to simulate randomness as in games or simulations, such as modeling the uncertainty of a coin flip.

Simulation of Random Events

Simulating random events involves applying random number generation and conditional logic to mimic real-world uncertainty. This concept is common in games and various simulations, where outcomes such as a coin flip need to reflect chance.

Transcript

00:01 In this video, we are going to create a program that prompts the user to enter the month in year and displays the number of days in the month.

00:06 For instance, if the user entered month 2 in year 2012, the program would display february 2012 had 29 days.

00:14 If the user entered month 3 in year 2015, the program should display march 2015 had 31 days.

00:24 I've already set up the class as well as the main method within it.

00:27 I've also imported java .utal .scanner since we know we'll be taking user input.

00:30 So we can go ahead into the main method and create a new scanner object named input by calling scanner with the argument system .in.

00:53 After this we can prompt the user to enter a month and a year.

00:59 We can use system .0 .0 .print l .n.

01:24 At this point we want to save the month followed by the year, so we can use next int and create two variables, int, month equals input.

01:40 Next, int.

01:45 And in year equals input dot next in.

01:56 So before we get into a switch statement, we can initialize in days equals 31.

02:05 We can initialize it as 31 since most of the months have 31 days, so 7 out of 12.

02:13 Next, we can initialize a string to hold the respective month, so we don't have to initialize it every time in our cases of our switch statement.

02:32 Now, here we can either do an if -then -else statement or a switch statement.

02:37 This is mostly based on readability, but we're just going to create a switch statement that handles each month as well as the number of days in that month and even leave years for the month of february.

02:49 So to do a switch statement, we say switch, our variable month, and within we have case one.

03:18 So for case one, the month string is january.

03:20 The days in january are 31, so we don't have to change that value.

03:26 And we can say break and then go do case two.

03:41 Our month string here is february.

04:01 Here we'll put an if statement for the leap year, but we'll come back to this.

04:09 Let's just get our other cases in.

04:24 Case 3, our month's string is march.

04:40 And again, we're going to want to put a break statement to omit the execution of the next case in the case that it was 3, right? so we're going to have to do this after every case.

04:58 Case 4, our month string is april...

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