SE 2040 Sample Code

ave.cpp: print the average of a list of integers
ave1000.cpp: same, but using arrays; build with g++ -std=c++11 ave1000.cpp
occurrences.cpp: count number of times a character appears input. If build to a.exe, then
```
        a.exe < occurrences.cpp
```
counts 17 semicolons, and
```
        a.exe _ < occurrences.cpp
```
counts 5 underscores.
distinct1000.cpp: count number of distinct values in the input.
todo.cpp: simple todo list using fixed-size arrays.
ave.h, ave.cpp, printave.cpp: illustrating separate compilation and reference parameters
simple_vector.h: Simple vector code
Time example: illustrates simple inheritance
Account balance: computing account balances, illustrating definitions distributed over multiple files.
alg-examp.cpp: illustrate algorithm code
list_iterator.cpp: illustrates iterating over a list

echoinput.rb: echo standard input to standard output (with line numbers); type
```
        ruby echoinput.rb < echoinput.rb
```
at the command prompt (after installing Ruby) to display the program.
sum.rb: compute sum of entered numbers. Enter
```
        ruby sum.rb
        5
        4
        3
        Control-Z
```
(where the last line is holding down the control key and pressing a Z) to print a 12.
gpa.rb: compute GPA
phones.rb: simple phone book based on arrays; to test, run irb and type
```
        irb> load 'phones.rb'
        irb> test_phone_book
```
revised-phones.rb: revised phone book using hash tables.