Problem Set 2
Purpose The purpose of this problem set is to practice developing simple and conditional functions. The functions deal with atomic forms of data (numbers, symbols, images).
Finger Exercises HtDP/2e: 13, 18, 19, 20, 21; 30, 31; 61, 64
Problem 1 Design favorite-star. Given the side-length of a pentagon, the color of the star, and a length sq-len, it places an appropriately sized and colored star in the middle of a square of the given length sq-len.
Problem 2 HtDP/2e: exercise 44. You will also have to solve preceding exercises but all you need to hand in is the solution of exercise 44.
Problem 3 People consider a climate humid if the average humidity is above 65%; in contrast, when the humidity is below 20%, people say it is dry. For percentages in between those two, people find it comfortable.
Design a function that translates measured percentages of humidity into words that describe human sensations.
a blue dot
a red dot
a black line between the blue and the red dots
a green dot on this line, 10% of the way along the line from the blue dot to the red dot. (Or, alternately, 90% of the way along the line in the reverse direction, from red to blue.)
Domain Knowledge (Geometry) To find the green point between the red and the blue one, cut the "distance" in each dimension to 90% and add the results to the respective coordinates of the red point.