Week 4, Lab 2 — Thursday, September 18

At the Start of Lab

Today's Lab Activity

Today, we have a short lab activity. As a group, discuss these questions:

Random Character in a File, Part 1 a “-” sign.

Suppose someone says to you, “I'm looking at a C++ source file and I see a - character. Can you tell me what it might signify?”

Is that enough context to give a definitive answer?

As a group, ponder the question: In code, what does the “-” sign mean?

• If the answer is, “it depends”, depends on what?

Random Character in a File, Part 2 a “&” sign.

Similarly, suppose someone says to you, “I'm looking at a C++ source file and I see a & character. Can you tell me what it might signify?”

Terminology

Notice some different C++ contexts:

Code	Context
int x = 42;	declaration (and definition)
setupFarm(3);	statement
a + b	expression
x = a;	assignment

Context Matters

Explain why each of these bits of code is nonsensical:

• "mint" x = 42;
• setupFarm(int);
• a +

Rest of the Lab

When you're finished with that task, you can work on finishing Homework 2. If you've finished but haven't actually made a patch with a real sewing machine, you can also go to the Maker Space downstairs and make one from your program's output.

See the instructions for embroidering a patch for more details!

If you've done that and you're all caught up with the online lessons, ask Prof. Melissa about whether she can provide Homework 3 early for you to work on.

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