CS 2420-20 Homework 12

Due: Thursday, March 1st, 2012 9:10am

Part 1 – Lists of Strings

Start with numlist.c from io.zip, but change it to read a list of space-separated strings instead of space-separated numbers.

For example, the input

  apple banana coconut .

should parse as the list that contains “apple”, “banana”, and “coconut”.

Of course, this program will work only for lists of strings where no string is supposed to contain a space and no string starts with a period.

Part 2 – Escaping Spaces

Change you program so that ! followed by a space is treated as a space inside the string, instead of a ! in a string followed by a string-separating space. Also, treat !! as a ! in a string, and treat !. as a period in a string. Any character after ! other than a space, !, or . is an error.

For example, the input

  apple! pie banana! split coconut! cream! pie!! !. donut .

should parse as the list that contains “apple pie”, “banana split”, “coconut cream pie!”, “.”, and “donut”.