# teaching machines

## CS 148 Lab 8 – Loops

October 30, 2019 by . Filed under cs1, cs148, fall 2019, labs.

Welcome to lab 8!

If you have checkpoints from the last lab to show your instructor or TA, do so immediately. No credit will be given if you have not already completed the work, nor will credit be given after the first 10 minutes of this lab.

In this lab, we’ll explore loops, which let us execute a task many times, but only code it once.

### Checkpoint 1

Person A types. Log in to Coding Bat and solve the following problems:

### Checkpoint 2

Person B types. Create a package lab07 in your Eclipse project. Solve the following problems.

• In class Vocab, use Scanner and File to read this file of vocabulary scores as measured by the General Social Survey from 1972 to 2004. Treat the file as plain text. Read and parse it one line at a time. Compute and display the mean score for both males and females.
• In class WordNeighbors, use Scanner and File to process a book of your choosing from Project Gutenberg. Identify a word of interest to you, like alien. Walk through the file one token at a time. Wherever the token contains your word, print the word with its predecessor and successor words. For simplicity, consider punctuation as part of a word. For example:
an alien ate
favorite alien is
by aliens. Mom!