动画介绍：整型：byte 1(B) short 2 integer 4 long 8
实型：single 4(B) double 8 decimal 16
字符型：char 2(B) string 取决于平台
其他：boolean 2(B) date 8 object 4
数据类型的转换：
1）CBool,CDbl,,CDec等
val str asc chr lcase ucase day month weekday year hour minute second
将日期转换为序列数：datevalue
将时间转换为序列数：timevalue
格式：函数名称（表达式）
2）Ctype
ctype(表达式，目标数据类型)
3）Format
format(表达式，格式符)
4）tostring,todouble,tochar等
例 dim a as integer a.tostring
option explicit 强制显式声明变量
Enum 枚举名 as 数据类型
枚举的成员名称=表达式
End Enum
例子1：
Dim str1, str2, str3, str4, str5 As String
str1 = Format(Now(), "long date")
Console.WriteLine("str1={0}", str1)
str2 = Format(Now(), "d")
Console.WriteLine("str2={0}", str2)
str3 = Format(1234.4, "##,##0.00")
Console.WriteLine("str3={0}", str3)
str4 = Format(123.4, "###0.00")
Console.WriteLine("str4={0}", str4)
str5 = Format(123.4, "0.00%")
Console.WriteLine("str5={0}", str5)
例子2:
Module Module1
Enum weekdays
sunday = 0
monday
tuesday
wednesday
thursday
friday
saturday
invalid = -1
End Enum
Sub Main()
Dim intweek1 As weekdays = weekdays.tuesday
Dim intweek2 As Integer
intweek2 = intweek1
Console.WriteLine("today is：{0}", intweek1)
Console.WriteLine("the nunber is:{0}", intweek2)
End Sub
End Module | |
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