Computer programming - Homework 4

1.One sentence per line Write a program that reads a text until EOF and prints it out transformed with the following three rules:

any sequence of whitespace is replaced by a single space
any period (dot) is followed by a newline
there is no whitespace at the start or end of any line

2. S-expressions An s-expression is either a word formed of letters, or a sequence of zero or more s-expressions, separated by whitespace, between parantheses: (exp1 exp2 ... expn). (These appear in functional languages such as LISP). Extra whitespace before or after each paranthesis is allowed.
Write a program that checks if the input (until EOF) is a valid s-expression.

Marius Minea

Last modified: Tue Oct 20 13:45:00 EEST 2015