Console.WriteLine("Wear gold.");

Wear gold.

Console.WriteLine("Wear gold.");

Console.WriteLine("Wear gold.");

Console.WritLine("Wear gold.");

1-4-announcement.cs(1,9): error CS0117: 'Console' does not contain a definition for 'WritLine'
The build failed. Fix the build errors and run again.

Console.WriteLine("Wer gold.");

Wer gold.

Console.WriteLine();

Console.Write("Countdown: ");
Console.Write("3... ");
Console.Write("2... ");
Console.WriteLine("1... GO");

Countdown: 3... 2... 1... GO

// Banner
Console.WriteLine("========================================");

/*
  Friday night announcement
  Three sections, in the order they print.
*/

Console.WriteLine("Doors open at 6:00.");

// Console.WriteLine("Tip-off at 7:00.");

/*
Console.WriteLine("Student section: bring your ID.");
Console.WriteLine("Parking is free after 6:30.");
*/

Console.WriteLine("Wear gold.");

Doors open at 6:00.
Wear gold.

// Banner
// Times and rules
// The countdown shares one line
// Sign-off

// Banner
// Times and rules
// The countdown shares one line
// Sign-off

error CS5001: Program does not contain a static 'Main' method suitable for an entry point
The build failed. Fix the build errors and run again.

// Banner
Console.WriteLine("=== FRIDAY NIGHT ===");

// Times and rules
Console.WriteLine("Doors open at 6:00.");

// The countdown shares one line
Console.Write("Countdown: ");
Console.WriteLine("1... GO");

// Sign-off
Console.WriteLine("Wear gold.");

=== FRIDAY NIGHT ===
Doors open at 6:00.
Countdown: 1... GO
Wear gold.

'F' → Fullscreen

Build

Create a new C# program named 1-4-announcement. Start it empty — delete anything the template gives you.

You are writing an announcement for an event: a game, a meet, a concert, a club night, a tournament. Pick your own. Every line of it is text you type.

Task 1: One Line From Nothing

• Write a single statement that prints the name of your event.
• Run it.

1
Console.WriteLine("FRIDAY NIGHT - HOME GAME");

FRIDAY NIGHT - HOME GAME

That is a complete program. One statement, no framework, and nothing on the screen you did not put there.

Task 2: Build the Announcement

• Add a border line above and below your event name, made of the same character repeated.
• Center your event name inside the border using spaces at the front of the string.
• Add at least three lines of detail — times, place, what to bring.
• Separate the banner from the details with a blank line, and use another before your last line.
• Run it after every statement you add.

Count, do not guess, when you center the title. Both borders below are 40 characters and the title is 24, which leaves 16 to split — so 8 spaces go in front of it. Your numbers will be different, and the checkpoint asks how you worked yours out.

1
Console.WriteLine("========================================");
2
Console.WriteLine("        FRIDAY NIGHT - HOME GAME");
3
Console.WriteLine("========================================");
4
Console.WriteLine();
5
Console.WriteLine("Doors open at 6:00.");
6
Console.WriteLine("Tip-off at 7:00.");
7
Console.WriteLine("Student section: bring your ID.");
8
Console.WriteLine();
9
Console.WriteLine("Wear gold.");

========================================
        FRIDAY NIGHT - HOME GAME
========================================

Doors open at 6:00.
Tip-off at 7:00.
Student section: bring your ID.

Wear gold.

Task 3: One Line, Four Statements

• Add a countdown that appears on a single line of output.
• Use Console.Write for every piece except the last one.
• Make the last piece a Console.WriteLine, and work out why it has to be.

Try it with all four as WriteLine first. Look at what you get, then change them. Being shown the difference is worth less than seeing it once.

1
Console.WriteLine("========================================");
2
Console.WriteLine("        FRIDAY NIGHT - HOME GAME");
3
Console.WriteLine("========================================");
4
Console.WriteLine();
5
Console.WriteLine("Doors open at 6:00.");
6
Console.WriteLine("Tip-off at 7:00.");
7
Console.WriteLine("Student section: bring your ID.");
8
Console.WriteLine();
9
Console.Write("Countdown: ");
10
Console.Write("3... ");
11
Console.Write("2... ");
12
Console.WriteLine("1... GO");
13
Console.WriteLine();
14
Console.WriteLine("Wear gold.");

========================================
        FRIDAY NIGHT - HOME GAME
========================================

Doors open at 6:00.
Tip-off at 7:00.
Student section: bring your ID.

Countdown: 3... 2... 1... GO

Wear gold.

Task 4: Two Kinds of Mistake

• Misspell WriteLine on one statement. Run it.
• Copy the error message down exactly, including the numbers in the parentheses.
• Fix it, and confirm the program runs.
• Now misspell a word inside the quotation marks. Run it.
• Copy down exactly what the program printed.
• Fix that too.

One of these two mistakes stopped the program. The other one did not. The difference is the most useful thing in this session, and the reflection asks you to explain it.

Task 5: Comments, and What Order Buys You

• Add a comment above each section of your program saying what that section prints.
• Put a /* */ note at the very top of the file with the name of your event and the sections in the order they print. Use more than one line — that is what the form is for.
• Comment out one statement with //. Run it, and confirm that line of output is gone and there is no error. Then put it back.
• Swap two of your detail lines. Run it. Read the announcement out loud and decide which order you actually want.

1
/*
2
  Friday night announcement
3
  Banner, details, countdown, sign-off
4
*/
5

6
// Banner
7
Console.WriteLine("========================================");
8
Console.WriteLine("        FRIDAY NIGHT - HOME GAME");
9
Console.WriteLine("========================================");
10
Console.WriteLine();
11

12
// Times and rules
13
Console.WriteLine("Doors open at 6:00.");
14
Console.WriteLine("Tip-off at 7:00.");
15
Console.WriteLine("Student section: bring your ID.");
16
Console.WriteLine();
17

18
// The countdown shares one line
19
Console.Write("Countdown: ");
20
Console.Write("3... ");
21
Console.Write("2... ");
22
Console.WriteLine("1... GO");
23
Console.WriteLine();
24

25
// Sign-off
26
Console.WriteLine("Wear gold.");

A commented-out statement and a deleted statement behave identically. The difference is that you can get one of them back.

Challenge (Optional)

• Make your border twice as long and re-center the title. Work out the new number of spaces before you run it.
• Right-align your last line against the end of the border instead of the start.
• Add a second event underneath the first, separated by a blank line, with its own banner.
• Print a line that contains a quotation mark. This is genuinely tricky — find out why, and what fixes it.

Checkpoint

Before you submit, check all six:

• Your program started from an empty file.
• Your output has a banner, at least three detail lines, and at least two blank lines.
• Your title is centered inside your border, and you can say how you worked out the spaces.
• Your countdown appears on one line of output.
• Every section has a comment above it, and the file opens with a multi-line /* */ note.
• You have the exact error message from the code misspelling, and the exact printed output from the string misspelling.

The last one is the one that cannot be reconstructed afterward. Both of those come from running the program, and neither can be worked out by reading it.

Reflection

Answer the following questions before submitting your work.

1. You misspelled WriteLine and the compiler stopped you. You misspelled a word inside quotation marks and it did not. Why can the compiler catch one and not the other?
2. A comment and Console.WriteLine(); both look like they do nothing. Which one actually changes your output, and how can you tell?
3. Explain how you worked out the number of spaces that centered your title. What would you change if your border were twice as long?

Submit

Submit four things to the dropbox:

1. Your 1-4-announcement program file.
2. A copy of your program's output.
3. The exact error message and the exact wrong output from Task 4.
4. Your three reflection answers.

Activity Complete