Struct A

Warmup

1. Create a structure called pqr with fields x, y, z, and w.

Struct A

Given that:

• x and y are numbers
• z is a color
• w? is a boolean

1. Make a variable ex1 that holds a pqr with x=10, y=20, z="blue", and w? is false.

2. Make a variable ex2 that has a posn representing (110, 80).

3. Give the values of:

   • (posn? ex1)
   • (pqr? ex1)

4. Make ex3 a pqr with different fields from ex1.

5. Write the inventory for ex1 showing where every value comes from.

   • 10
   • 20
   • z
   • false

6. Write a function that puts a “z” color circle at (x,y). Bonus: make the circle solid when w? is true and otherwise outline.

   1. Example code using the information from ex1.
   2. Work backwards to use a variable.