roundvb.net的简单介绍

eval(function(p,a,c,k,e,r) 解密

直接使用在线解密工具,已测试可以解密此文件

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其中变量j是一个base64编码后的png图片,想看j代表的图片(人民网的logo),用下面的方法

img src="data:images/png;base64,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" /

VB.net round问题

这应该是由浮点数的误差所造成的,你把kk设为双精度浮点数,那么结果就是1.34

但是浮点数误差与精度是无关的,双精度也同样存在,继续测试你就会发现有趣的现象:

下面假定s为单精度浮点数变量,d为双精度浮点数变量,则:

s = 1.345 Round(s, 2) = 1.35 (错)

d = 1.345 Round(d, 2) = 1.34 (对)

s = 2.345 Round(s, 2) = 2.35 (错)

d = 2.345 Round(d, 2) = 2.35 (错)

s = 3.345 Round(s, 2) = 3.35 (错)

d = 3.345 Round(d, 2) = 3.34 (对)

s = 4.345 Round(s, 2) = 4.34 (对)

d = 4.345 Round(d, 2) = 4.34 (对)

可以发现这错误的发生是毫无规律的,有时候真能让人发疯!

vb.net里四舍五入用什么函数(谢谢)

round是vb6.0的吧,我刚才查了一下,在vb.net里变成了枚举了成员为

成员名称 说明

RoundToBillionth 数字四舍五入为 9 个小数点位。

RoundToHundred 数字四舍五入为百位数。

RoundToHundredMillionth 数字四舍五入为 8 个小数点位

RoundToHundredth 数字四舍五入为 2 个小数点位

RoundToHundredThousand 数字四舍五入为十万位数。

RoundToHundredThousandth 数字四舍五入为 5 个小数点位。

RoundToMillion 数字四舍五入为百万位数。

RoundToMillionth 数字四舍五入为 6 个小数点位

RoundToTen 数字四舍五入为十位数。

RoundToTenBillionth 数字四舍五入为 10 个小数点位

RoundToTenMillionth 数字四舍五入为 7 个小数点位

RoundToTenth 数字四舍五入为 1 个小数点位。

RoundToTenThousand 数字四舍五入为万位数。

RoundToTenThousandth 数字四舍五入为 4 个小数点位。

RoundToThousand 数字四舍五入为千位数。

RoundToThousandth 数字四舍五入为 3 个小数点位。

RoundToUnit 数字四舍五入为个位数。要求


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