爬蟲(chóng)入門教程 VB編程代碼都有哪些?
VB編程代碼都有哪些?1. 數(shù)值函數(shù):ABS(Num):返回絕對(duì)值SGN(Num):Num>0 1 Num=0 0 Num<0-1判斷正負(fù)值hex(Num):直接返回十六進(jìn)制值:&hxx
VB編程代碼都有哪些?
1. 數(shù)值函數(shù):
ABS(Num):返回絕對(duì)值
SGN(Num):Num>0 1 Num=0 0 Num<0-1判斷正負(fù)值
hex(Num):直接返回十六進(jìn)制值:&hxx最大8位
OCT(Num):直接返回八進(jìn)制值:&oxx最大8位
SQR(Num):返回平方根Num>0int(Num):整數(shù)int(99.8)=99 int(-99.2)=100
fix(Num):整數(shù)fix(99.8)=99 fix(-99.2)=99 round(Num,n):round(3.14159,3)=3.142,round(3.25,1)=3.2
log(Num):以E的對(duì)數(shù)為基數(shù)>0
exp(n):取E的n次方,常用的Num^n
sin(Num):三角函數(shù),按弧度(角度*PAI)/180=弧度con(Num)Tan(Num)ATN(Num)計(jì)算