vb常用函數(shù)

1、1.p=ABS(X):取X的絕對(duì)值.2.p=Log(X):求X的自然對(duì)數(shù).3.Y=Sgn(X):符號(hào)函數(shù).說(shuō)明:X0時(shí)Y=1X=0時(shí)Y=0X0時(shí)Y=1.例:Response.writesgn(5)輸出:14.Sin(x)Cos(x)Tan(x)Atn(x):三角函數(shù)5.Ctype(x):類型轉(zhuǎn)換:P=Cbool(x)把X轉(zhuǎn)成”布爾”值P=Cbyte(X)字節(jié)P=Ccur(x)金額P=Cdatel(x)日期P=Cintl(x)雙精度P=C

2、Dbl(x)整型P=Clng(x)長(zhǎng)整型P=Csng(X)單精度P=Cstr(x)字符串例:Response.writeCDbl(#111900#)結(jié)果:2注意:True:1False:0日期:#12301899#為0每往后1日數(shù)值加1.每往前1日數(shù)值減16.Int(x):取=X的整數(shù)值7.Fix(X):取X的整數(shù)部分直接去掉小數(shù)部分.Response.WriteInt(54.6)結(jié)果為:55.取=54.6的最大整數(shù).Response.

3、WriteInt(54.6)結(jié)果:54.Response.WriteFix(54.6)結(jié)果:54Response.WriteFix(54.6)結(jié)果:548.(X):返回字符串的第一個(gè)字符的字符碼。9.Chr(X):返回字符碼X的字符.P=(“A”)p=65結(jié)果:X=”Thisisgood”16.Right(Xn):返回字符串X右邊N個(gè)字符。P=Replace(XSR)將字符串X中的字符串S替換成為字符串R，然后返回。X=“aspisgo

4、od”P=Replace(Xgoodnice)P=”aspisnice”Space(n):返回N個(gè)空格所組成的字符串，P=Space(nX):返回N個(gè)X的第一個(gè)字符所組成的字符串。X可以是字符串，也可以是字符碼。17，Split:將字符串侵害成字符串?dāng)?shù)組。P=Split(S[d])以D參數(shù)為分隔字符，將字符串S侵害成多個(gè)字符串后，組成一個(gè)字符串?dāng)?shù)組。然后返回，若省略D參數(shù)，則以空格符為分隔字符。P=Split(“abc”””)P(0)=