panteley wrote:
我用Swing 做界面有多年了，基本上AWT 和 Swing 的每个类都被我用过了。

littledeer1974 wrote:
对不起
我忘了告诉大家
我是冯诺依曼

"Binary system invented by Leibnitz, based on the I Ching: letter from Leibnitz to Father Bouvret, missionary in China, dated 18 October 1697, held at the Berlin Museum."
http://www.cornelius-celsus.ch/en/2_0_recher/Notes.htm

scottding wrote:
彻底晕了。。。。大家继续。

Question - For my next class I am teaching I need to know the following:
1.Who invented the # zero.
2.Where it was invented.
3. What happened.
4.Why they invented it.
5.How they invented it.

The nr. zero was invented independently in India and by the Maya. In India a decimal system was used, like ours, but they used an empty space for zero up to 3rdCentury BC. This was confusing for an empty space was also used to separate numbers, and so they invented the dot for a zero. The first evidence for the use of the symbol that we now know as zero stems from the 7th century AD. The Maya invented the number zero for their calendars in the 3rd century AD.

The number zero reached European civilisation through the Arabs after 800 AD. The Greek and Roman did not need the number zero for they did their calculations on an abacus. The name 'zero' comes from the arabic 'sifr'.
(Data from the book "the calender" by D. E. Duncan).

Dr. Wassenaar

cslx wrote:
hehe ,能写个免费的JUTE让大家随便下载就算你高手,否则免谈

ditty wrote:
不好意思，我不是很牛，但是，我有一项技术很牛！！！那就是:

很会吹牛，牛人基本都是我吹得，你想变得很牛吗？找我帮你吹吧！保您足够牛！！！
价格公道，有意者免谈。