string playerName = "Maya Okonkwo";
int jerseyNumber = 24;

int score = 0;
score = 3;

score = score + 2;

score = score + 2;

score + 2;

1-6-gameday.cs(2,1): error CS0201: Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement
The build failed. Fix the build errors and run again.

Console.WriteLine(8 + 3);
Console.WriteLine(8 - 3);
Console.WriteLine(8 * 3);
Console.WriteLine(8 / 3);

11
5
24
2

double average = 47 / 6;
Console.WriteLine(average);

7

Console.WriteLine(47.0 / 6);

7.833333333333333

Console.WriteLine(17 / 5);
Console.WriteLine(17 % 5);

3
2

Console.WriteLine(2 + 3 * 4);
Console.WriteLine((2 + 3) * 4);

14
20

Console.Write("Score: ");
Console.WriteLine(score);

Console.WriteLine($"Score is {score}.");

Console.WriteLine($"Two more puts her on {score + 2}.");

'F' → Fullscreen

Build

Create a new C# program named 1-6-gameday, starting empty.

Use the same subject you chose for Activity 1.5 — the athlete, character, or officer whose card you built. Today they get a score that moves.

This activity runs over two sessions. Tasks 1 to 4 are the first; Tasks 5 and 6 are the second.

Task 1: A Value That Changes

• Declare a string for the name and an int score starting at 0.
• Print the name, then the score.
• On a new line, put 3 into the score. Do not write int again.
• Print the score a second time.

Two lines of output, two different numbers, one variable. That is the whole idea.

1
string playerName = "Maya Okonkwo";
2
int score = 0;
3

4
Console.Write(playerName);
5
Console.WriteLine(" tips off.");
6
Console.Write("Score: ");
7
Console.WriteLine(score);
8

9
score = 3;
10
Console.Write("Score: ");
11
Console.WriteLine(score);

Maya Okonkwo tips off.
Score: 0
Score: 3

Task 2: Update It From Itself

• Add two more baskets, each worth 2, and print the score after each.
• Do not type 5 or 7 anywhere. The program works them out.
• Note: the green lines marked with a + sign are new. Do not type the + sign.

1
string playerName = "Maya Okonkwo";
2
int score = 0;
3

4
Console.Write(playerName);
5
Console.WriteLine(" tips off.");
6
Console.Write("Score: ");
7
Console.WriteLine(score);
8

9
score = 3;
10
Console.Write("Score: ");
11
Console.WriteLine(score);
12

13
score = score + 2;
14
Console.Write("Score: ");
15
Console.WriteLine(score);
16

17
score = score + 2;
18
Console.Write("Score: ");
19
Console.WriteLine(score);

Maya Okonkwo tips off.
Score: 0
Score: 3
Score: 5
Score: 7

Task 3: Splitting the Tournament

• Forty-seven players sign up. Teams hold six.
• Work out the number of full teams and the number of players left over.
• Both values must be calculated, not typed in.
• Check it by hand first: 6 × 7 = 42, and 47 − 42 = 5.

1
Console.WriteLine();
2

3
int players = 47;
4
int perTeam = 6;
5
int fullTeams = players / perTeam;
6
int leftOver = players % perTeam;
7

8
Console.Write("Players:    ");
9
Console.WriteLine(players);
10
Console.Write("Full teams: ");
11
Console.WriteLine(fullTeams);
12
Console.Write("Left over:  ");
13
Console.WriteLine(leftOver);

Players:    47
Full teams: 7
Left over:  5

Whole-number division did the hard part for you. 47 / 6 is 7 on its own — there is nothing to round down, because the fraction was never kept.

Task 4: Break It on Purpose

Five experiments. Write down exactly what appears each time, copied from the screen rather than from memory. Undo each one before the next.

1. Print 8 / 3.
2. Add double average = 47 / 6; and print average.
3. Print 47.0 / 6.
4. Print 10 % 3 * 2, then print 10 % (3 * 2).
5. Put score + 2; on a line by itself, with nothing to the left of it.

One of these refuses to run. The other four produce a number, and at least two of them will not be the number you expected. Which is which is what the sheet asks for.

Task 5: Say It in One Line

• Replace every Console.Write and Console.WriteLine pair with a single interpolated line.
• Make each line read like a sentence rather than a label and a number.
• Count your program's lines before and after. Write both numbers down.

1
string playerName = "Maya Okonkwo";
2
int score = 0;
3

4
Console.WriteLine($"{playerName} tips off at {score}.");
5

6
score = 3;
7
Console.WriteLine($"Three-pointer. Score is {score}.");
8

9
score = score + 2;
10
Console.WriteLine($"Layup. Score is {score}.");
11

12
score = score + 2;
13
Console.WriteLine($"Another two. Score is {score}.");
14

15
Console.WriteLine();
16

17
int players = 47;
18
int perTeam = 6;
19
int fullTeams = players / perTeam;
20
int leftOver = players % perTeam;
21

22
Console.WriteLine($"{players} players, {perTeam} to a team.");
23
Console.WriteLine($"Full teams: {fullTeams}");
24
Console.WriteLine($"Left over:  {leftOver}");

Maya Okonkwo tips off at 0.
Three-pointer. Score is 3.
Layup. Score is 5.
Another two. Score is 7.

47 players, 6 to a team.
Full teams: 7
Left over:  5

Task 6: The Entry Bill

• A full team pays 25 to enter. A leftover player pays 7 to join a mixed team.
• Print the team total, the solo total, and the sum of both.
• Do the arithmetic inside the holes. No new variables for the three totals.
• Now change players to 100 and run it again. Every number should move. Set it back to 47.

1
Console.WriteLine();
2

3
int teamFee = 25;
4
int soloFee = 7;
5

6
Console.WriteLine($"Team entries: {fullTeams * teamFee}");
7
Console.WriteLine($"Solo entries: {leftOver * soloFee}");
8
Console.WriteLine($"Total:        {fullTeams * teamFee + leftOver * soloFee}");

Challenge (Optional): Predict Before You Run

• Write these four as comments, and next to each write what you think it will print:
• 10 - 2 * 3   (10 - 2) * 3   7 / 2   7 % 2
• Now print them and compare. The ones you got wrong are the ones worth remembering.

Same Idea, Exam Notation

int total = 17 + 5;
int extra = 17 % 5;
score = score + 2;

total ← 17 + 5
extra ← 17 MOD 5
score ← score + 2

• +, -, *, and / are written the same way in both.
• Remainder is spelled MOD instead of %. Same operation, same priority.
• Assignment is an arrow. score ← score + 2 is the same instruction as score = score + 2;, read the same way: right side first.

The sheet also lists one thing you have no C# match for yet:

roll ← RANDOM(1, 6)

RANDOM(a, b) gives a whole number from a to b, and both ends are included — so RANDOM(1, 6) can give a 1 or a 6. Getting randomness in C# takes a little more, and Activity 1.16 does it.

Checkpoint

Your finished program should produce this.

Maya Okonkwo tips off at 0.
Three-pointer. Score is 3.
Layup. Score is 5.
Another two. Score is 7.

47 players, 6 to a team.
Full teams: 7
Left over:  5

Team entries: 175
Solo entries: 35
Total:        210

• The score reaches 7 without 7 appearing anywhere in your program.
• No Console.Write and Console.WriteLine pair is left.
• Changing players to 100 moves every number below it.
• All five Task 4 results are written down, copied from the screen.

Reflection

Answer the following questions before submitting your work.

1. score = score + 2; would be false as a math equation. Describe, in order, what C# actually does with that line.
2. 47 / 6 gave 7 and 47.0 / 6 gave 7.833333333333333. Only one character changed. Explain why that changed the answer.
3. The exam reference sheet says 17 / 5 is 3.4. C# says it is 3. Both are correct. How would you explain that to someone who thinks one of them must be wrong?
4. Your Task 5 rewrite is shorter than the version it replaced. Name one thing that got easier to read, not just shorter.

Submit

Submit four things to the dropbox:

1. Your 1-6-gameday program file.
2. A copy of its output.
3. Your five Task 4 results and your two line counts from Task 5.
4. Your four reflection answers.

Activity Complete