被转换的阿拉伯数字只限于1-9999，原因大约有两点

1.作者对罗马数字的逻辑规律未作深入探讨，欢迎赐教zngsai@163.com

2.罗马数字上面加一横扩大一千倍的约定不能与计算机的单字符世界很好兼容-Arabic numerals are converted confined 1-9999, there are two reasons 1. The author about the laws of logic is not Roman numeral for in-depth discussion, welcomed the wing zngsai@163.com 2. Roman numerals above plus a horizontal expansion of a thousand times Conventions and the computer can not be well with the world single character