' 用途：將十進位制轉化為二進位制
' 輸入：dec(十進位制數)
' 輸入資料型別：long
' 輸出：dec_to_bin(二進位制數)
' 輸出資料型別：string
' 輸入的最大數為2147483647，輸出最大數為1111111111111111111111111111111(31個1)
public function dec_to_bin(dec as long) as string
dec_to_bin = ""
do while dec > 0
dec_to_bin = dec mod 2 & dec_to_bin
dec = dec \ 2
loop
end function
' 用途：將二進位制轉化為十進位制
' 輸入：bin(二進位制數)
' 輸入資料型別：string
' 輸出：bin_to_dec(十進位制數)
' 輸出資料型別：long
' 輸入的最大數為1111111111111111111111111111111(31個1)，輸出最大數為2147483647
public function bin_to_dec(byval bin as string) as long
dim i as long
for i = 1 to len(bin)
bin_to_dec = bin_to_dec * 2 + val(mid(bin, i, 1))
next i
end function
' 用途：將十六進製制轉化為二進位制
' 輸入：hex(十六進製制數)
' 輸入資料型別：string
' 輸出：hex_to_bin(二進位制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function hex_to_bin(byval hex as string) as string
dim i as long
dim b as string
hex = ucase(hex)
for i = 1 to len(hex)
select case mid(hex, i, 1)
case "0": b = b & "0000"
case "1": b = b & "0001"
case "2": b = b & "0010"
case "3": b = b & "0011"
case "4": b = b & "0100"
case "5": b = b & "0101"
case "6": b = b & "0110"
case "7": b = b & "0111"
case "8": b = b & "1000"
case "9": b = b & "1001"
case "a": b = b & "1010"
case "b": b = b & "1011"
case "c": b = b & "1100"
case "d": b = b & "1101"
case "e": b = b & "1110"
case "f": b = b & "1111"
end select
next i
while left(b, 1) = "0"
b = right(b, len(b) - 1)
wend
hex_to_bin = b
end function
' 用途：將二進位制轉化為十六進製制
' 輸入：bin(二進位制數)
' 輸入資料型別：string
' 輸出：bin_to_hex(十六進製制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function bin_to_hex(byval bin as string) as string
dim i as long
dim h as string
if len(bin) mod 4 <> 0 then
bin = string(4 - len(bin) mod 4, "0") & bin
end if
for i = 1 to len(bin) step 4
select case mid(bin, i, 4)
case "0000": h = h & "0"
case "0001": h = h & "1"
case "0010": h = h & "2"
case "0011": h = h & "3"
case "0100": h = h & "4"
case "0101": h = h & "5"
case "0110": h = h & "6"
case "0111": h = h & "7"
case "1000": h = h & "8"
case "1001": h = h & "9"
case "1010": h = h & "a"
case "1011"
: h = h & "b"
case "1100": h = h & "c"
case "1101": h = h & "d"
case "1110": h = h & "e"
case "1111": h = h & "f"
end select
next i
while left(h, 1) = "0"
h = right(h, len(h) - 1)
wend
bin_to_hex = h
end function
' 用途：將十六進製制轉化為十進位制
' 輸入：hex(十六進製制數)
' 輸入資料型別：string
' 輸出：hex_to_dec(十進位制數)
' 輸出資料型別：long
' 輸入的最大數為7fffffff,輸出的最大數為2147483647
public function hex_to_dec(byval hex as string) as long
dim i as long
dim b as long
hex = ucase(hex)
for i = 1 to len(hex)
select case mid(hex, len(hex) - i + 1, 1)
case "0": b = b + 16 ^ (i - 1) * 0
case "1": b = b + 16 ^ (i - 1) * 1
case "2": b = b + 16 ^ (i - 1) * 2
case "3": b = b + 16 ^ (i - 1) * 3
case "4": b = b + 16 ^ (i - 1) * 4
case "5": b = b + 16 ^ (i - 1) * 5
case "6": b = b + 16 ^ (i - 1) * 6
case "7": b = b + 16 ^ (i - 1) * 7
case "8": b = b + 16 ^ (i - 1) * 8
case "9": b = b + 16 ^ (i - 1) * 9
case "a": b = b + 16 ^ (i - 1) * 10
case "b": b = b + 16 ^ (i - 1) * 11
case "c": b = b + 16 ^ (i - 1) * 12
case "d": b = b + 16 ^ (i - 1) * 13
case "e": b = b + 16 ^ (i - 1) * 14
case "f": b = b + 16 ^ (i - 1) * 15
end select
next i
hex_to_dec = b
end function
' 用途：將十進位制轉化為十六進製制
' 輸入：dec(十進位制數)
' 輸入資料型別：long
' 輸出：dec_to_hex(十六進製制數)
' 輸出資料型別：string
' 輸入的最大數為2147483647,輸出最大數為7fffffff
public function dec_to_hex(dec as long) as string
dim a as string
dec_to_hex = ""
do while dec > 0
a = cstr(dec mod 16)
select case a
case "10": a = "a"
case "11": a = "b"
case "12": a = "c"
case "13": a = "d"
case "14": a = "e"
case "15": a = "f"
end select
dec_to_hex = a & dec_to_hex
dec = dec \ 16
loop
end function
' 用途：將十進位制轉化為八進位制
' 輸入：dec(十進位制數)
' 輸入資料型別：long
' 輸出：dec_to_oct(八進位制數)
' 輸出資料型別：string
' 輸入的最大數為2147483647,輸出最大數為177public function dec_to_oct(dec as long) as string
dec_to_oct = ""
do while dec > 0
dec_to_oct = dec mod 8 & dec_to_oct
dec = dec \ 8
loop
end function
' 用途：將八進位制轉化為十進位制
' 輸入：oct(八進位制數)
' 輸入資料型別：string
' 輸出：oct_to_dec(十進位制數)
' 輸出資料型別：long
' 輸入的最大數為177********,輸出的最大數為2147483647
public function oct_to_dec(byval oct as strin
ing) as long
dim i as long
dim b as long
for i = 1 to len(oct)
select case mid(oct, len(oct) - i + 1, 1)
case "0": b = b + 8 ^ (i - 1) * 0
case "1": b = b + 8 ^ (i - 1) * 1
case "2": b = b + 8 ^ (i - 1) * 2
case "3": b = b + 8 ^ (i - 1) * 3
case "4": b = b + 8 ^ (i - 1) * 4
case "5": b = b + 8 ^ (i - 1) * 5
case "6": b = b + 8 ^ (i - 1) * 6
case "7": b = b + 8 ^ (i - 1) * 7
end select
next i
oct_to_dec = b
end function
' 用途：將二進位制轉化為八進位制
' 輸入：bin(二進位制數)
' 輸入資料型別：string
' 輸出：bin_to_oct(八進位制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function bin_to_oct(byval bin as string) as string
dim i as long
dim h as string
if len(bin) mod 3 <> 0 then
bin = string(3 - len(bin) mod 3, "0") & bin
end if
for i = 1 to len(bin) step 3
select case mid(bin, i, 3)
case "000": h = h & "0"
case "001": h = h & "1"
case "010": h = h & "2"
case "011": h = h & "3"
case "100": h = h & "4"
case "101": h = h & "5"
case "110": h = h & "6"
case "111": h = h & "7"
end select
next i
while left(h, 1) = "0"
h = right(h, len(h) - 1)
wend
bin_to_oct = h
end function
' 用途：將八進位制轉化為二進位制
' 輸入：oct(八進位制數)
' 輸入資料型別：string
' 輸出：oct_to_bin(二進位制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function oct_to_bin(byval oct as string) as string
dim i as long
dim b as string
for i = 1 to len(oct)
select case mid(oct, i, 1)
case "0": b = b & "000"
case "1": b = b & "001"
case "2": b = b & "010"
case "3": b = b & "011"
case "4": b = b & "100"
case "5": b = b & "101"
case "6": b = b & "110"
case "7": b = b & "111"
end select
next i
while left(b, 1) = "0"
b = right(b, len(b) - 1)
wend
oct_to_bin = b
end function
' 用途：將八進位制轉化為十六進製制
' 輸入：oct(八進位制數)
' 輸入資料型別：string
' 輸出：oct_to_hex(十六進製制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function oct_to_hex(byval oct as string) as string
dim bin as string
bin = oct_to_bin(oct)
oct_to_hex = bin_to_hex(bin)
end function
' 用途：將十六進製制轉化為八進位制
' 輸入：hex(十六進製制數)
' 輸入資料型別：string
' 輸出：hex_to_oct(八進位制數)
' 輸出資料型別：string
' 輸入的最大數為***個字元
public function hex_to_oct(byval hex as string) as string
dim bin a
s string
hex = ucase(hex)
bin = hex_to_bin(hex)
hex_to_oct = bin_to_oct(bin)
end function
vb自帶函式：
十進位制轉八進位制：oct(num)
十六進製制轉八進位制：oct("&h" & num)
十進位制轉十六進製制：hex(num)
八進位制轉十六進製制：hex("&o" & num)
十六進製制轉換為十進位制
dim str as stringstr =
= clng("&h" & str)
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