关于round的问题：(100分)

今天我编了个程序发现一个奇怪的现象：
round(1/2)=0
round(3/2)=2
round(5/2)=2
round(7/2)=4
round(9/2)=4
为什么会出现这样的结果?到底round是不是根据四舍五入来取整？

round是取最接近它的整数，四舍五入用trunc

怎么可能呢 ？
Round 是四舍五入，Trunc是取整数部分！

Round returns an Int64 value that is the value of X rounded to the nearest
whole number. If X is exactly halfway between two whole numbers, the result
is always the even number. This method of rounding is often called
揃anker抯 Rounding?
The Trunc function truncates a real-type value to an integer-type value. X
is a real-type expression. Trunc returns an Int64 value that is the value
of X rounded toward zero.
看看吧，Help里面的。

CJF写的对，应该多看帮助，可以结束给分了。
你不结束，过两天我就结束它了！

接受答案了.