Ruby 注释 连行 赋值

#!/usr/bin/ruby -w
# -*- coding: UTF-8 -*-
print  "Hello World! ";
puts "你好，世界！";   #Hello World! 你好，世界！
=begin
  puts  6/5
  puts  6/5.0
  多行注释可以用=begin  和  =end
  实际上，这是Ruby的内嵌文档Rdoc，类似javadoc  ，
  可以用命令 ri 从源文件生产文档。
=end
puts  3/5 ; puts  3/5.0 
puts  "这里演示" \
"连行"

print "赋值\n" 
a = 1 ;b =  2 + 3;print "a=",a," b=",b,"\n"           
a ,b = b ,a;print "a=",a," b=",b,"\n" #a=5 b=1
x=0;
a,b,c = x, (x+1), (x+2)  ;print "a=",a," b=",b," c=",c,"\n" #a=0 b=1 c=2