CSC 161 Module to Introduce Conditionals, Loops, and Scribbler 2 Motion

Introduction

This module introduces CSC 161 students to several fundamental elements of programming in C, including:

1. using conditional statements (e.g., if, switch),
2. using loops (e.g., initialization, iteration, condition testing, loop body with for, while), and
3. introducing motion with the Scribbler 2 robot.

Day-by-day Details

Day	Topic	Preparation	In-class	Due Date	Availability for Extra Credit
Wednesday, February 1	Module 1: Conditionals, Loops, and Motion		Examples quarts-2.c dance.c ice-cream-truck.c couple-1.c couple-2.c
Monday, February 6	Types and Variables (with casting)	Kernighan & Ritchie, 1.1, 2.1-2.4, 2.7	Types and Variables Lab
Tuesday, February 7	Conditionals, Scribbler 2 Motion	Kernighan & Ritchie, 1.5, 3.1-3.4 Boolean Values and Expressions Scribbler 2 Motion reading Examples: conditional-battery.c follower-1.c follower-2.c second-counter.c	Conditionals Lab
Wednesday, February 8	Loops	Kernighan & Ritchie, 1.3, 1.4, 3.5 Examples: Annotated counting-loop.c Annotated asterisk-loop.c loops.c coins.c	Loops Lab		Monday, February 13
Friday, February 10	Loops and Scribbler 2 Motion	Kernighan & Ritchie, 3.6-3.7	Motion and Loops Lab
Monday, February 13	Supplemental Problem 1		Supplemental Problem 1 (done individually)	Monday, February 13
Monday, February 13	Project		Robot performs looped actions and sounds	Friday, February 17

Project Options

Working in pairs, students should develop a program that includes these elements:

• Program controls robot such that the robot avoids obstacles in the room.
• Robot recalls the last two actions (currently done and the one one before that).
• If robot performs the same two turns in a row (e.g. two right turns), robot beeps and turns around (before performing any further movements). Note that this is only when there are two turns, so going forward or backward twice in a row does not count!
• Every ten actions, robot performs a short dance three times in a row (the dance can just be a few actions).
• At least two if statements
• At least three loops, at least one of which must be a for loop, and at least one must be a while loop
.

Together with the program, a student pair must write a paragraph that describes what steps are needed to demonstrate the program is working correctly (this can be pseudocode).

Project Submission

Here are some guidelines for this project:

• The very first part of a program listing should indicate the authors of the project (use a C comment).
• The paragraph description of the project may be included in comments at the start of the program, or it may be written as a separate document.
  • If the description is included in the program, please place the paragraph immediately after the authors' names.
  • If the description is separate, please be sure the authors's names are at the top of the page.
• A copy of the program and description should be printed and turned in at the start of class when the project is due.
• A copy of the program and description also should be emailed to the instructor at walker@cs.grinnell.edu by the start of the class when the project is due. In the email, please include the authors' names as well as the project title in the subject line.

Grading

This project will be worth 25 points, based on the following rubric:

• Control of robot activities (7 points)
• Inclusion of at least two if statements that impact the functioning of the program (6 points)
• Use of three loops (as specified) that control the program's processing (6 points)
• Neatness and conciseness of code (6 points)