tool for generating cpp and hpp files

mkcpp.rb

#! /usr/bin/ruby

# Somewhat counter-intuitively, Ruby's ARGV doesn't include the file name, 
# so the vector is 1 shorter than normal.
# Typically writing ./mkcpp.rb foo would give a vector like ARGV = ["mkcpp.rb", "foo"], but not here.
if ARGV.length < 1 then
    puts "Please provide a sufficient number of arguments"
    exit
end

if ARGV[0].eql?("-h") || ARGV[0].eql?("--help") then
    puts "mkcpp.rb is a tool for generating C++ files with their associated headers"
    puts "The .cpp files already include the header, and the .hpp files come complete with #ifndef clauses"
    puts "\nTo use the tool type mkcpp [filename]"
    exit
end

# Acquire file name
filename = ARGV[0]

# Check if file has spaces in its name
if filename.include? ' ' then
    puts "'#{filename}' contains spaces, replacing them with underscores."
    filename.sub! /\s/, '_'
end

headername = filename.upcase + "_HPP"

# write CPP file
File.open("./#{filename}.cpp", "w+") do |file|
    puts "Writing #{filename}.cpp..."
    file.write "#include \"#{filename}.h\"\n"
end

# write HPP file
File.open("./#{filename}.hpp", "w+") do |file|
    puts "Writing #{filename}.hpp..."
    file.write "#ifndef #{headername}\n"
    file.write "#define #{headername}\n"
    file.write "\n// Your code goes here\n\n"
    file.write "#endif\n"
end