习题 18 命名、变量、代码和函数

# ex18.rb

def print_two(*args)
    arg1, arg2 = args
    puts "arg1: #{arg1}, arg2: #{arg2}"
end

def print_two_again(arg1, arg2)
    puts "arg1: #{arg1}, arg2: #{arg2}"
end

def print_one(arg1)
    puts "arg1: #{arg1}"
end

def print_none()
    puts "I got nothin'."
end

print_two("Zed", "Shaw")
print_two_again("Zed", "Shaw")
print_one("First!")
print_none()

结果：

$ ruby ex18.rb
arg1: Zed, arg2: Shaw
arg1: Zed, arg2: Shaw
arg1: First!
I got nothin'.