以下Lua Code:
math.log2 = function (x)
return math.log(x) / math.log(2)
end
...
for i = math.floor(math.log2(n)) - 1, math.floor(math.log2(n)) do...
n是 >= 0的整數，要注意for有可能造成無窮迴圈，
因為math.log(0)是-inf，不會彈出錯誤，
所以造成for變成無窮迴圈，而不只是做兩次…
另外注意，-inf跟同樣是-inf比對是true, 例如：
ath.log(0) == -3/0==> true若是nan比對，一定是false, 例如：math.log(-1) == math.log(-1)==> false
Ref:Microsoft Safedisc - Microsoft Community
Microsoft didn't make SafeDisc, it was created by the Rovi Corporation. You can learn more at: How to Play Games with SafeDisc or SecureRom DRM on Windows 10
is to use the one stop option - Driver Signature Enforcement Overrider 1.3b
I've never used this, but it does apparently work. However, I've been using noCD fix\hacks since I started using PC for games in 2004.
The easiest way to do this is to employ the Driver Signature Enforcement Overrider tool, which, when run as administrator, enables you to sign a previously untrusted file.
Once you've acquired a copy of the SECDRV.SYS file (either by downloading it or copying it from the c:\windows\system32\drivers directory on Windows Vista, 7 or 8, and saving it to the same location in Windows 10), run the DSEO tool by right-clicking dseo13b.exe and selecting Run as administrator.
Work through the subsequent dialogue boxes until you see the main menu and select Enable Test Mode then click Next.
This time, select Sign a System File, and browse to the SECDRV.SYS file in c:\windows\system32\drivers. Click OK, and wait while the driver is signed. You'll see the following message:
Once you have followed the instructions to restart and then run DSEO again with Test Mode enabled, the driver should now be loaded by the game you've had trouble with, restoring your ability to play it.
(Should you be using Windows 10 Technical Preview, enabling Test Mode will result in a watermark appearing on your display. This can be removed using the Remove Watermark option in DSEO.)
Ref:NGOHQ.com
How to Play Games with SafeDisc or SecureRom DRM on Windows 10 (makeuseof.com)
func power(_ xx: Int, _ yy: Int, _ p: Int) -> Int
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{
var res = 1 // Initialize result
var x = xx % p // Update x if it is more than or
// equal to p
var y = yy
while (y > 0)
{
// If y is odd, multiply x with result
if 1 == y % 2{
res = (res*x) % p
}
// y must be even now
y = y>>1 // y = y/2
x = (x*x) % p
}
return res
}
// false if n is composite and returns true if n is
// probably prime.
// d is an odd number such that d*2<sup>r</sup> = n-1
// for some r >= 1
func miillerTest(_ dd: Int, _ n: Int) -> Bool
{
// Pick a random number in [2..n-2]
// Corner cases make sure that n > 4
let a = 2 + Int.random(in: 0...n-4)
var d = dd
// Compute a^d % n
var x = power(a, d, n);
if (x == 1 || x == n-1){
return true
}
// Keep squaring x while one of the following doesn't
// happen
// (i) d does not reach n-1
// (ii) (x^2) % n is not 1
// (iii) (x^2) % n is not n-1
while (d != n-1)
{
x = (x * x) % n;
d *= 2;
if (x == 1) {return false}
if (x == n-1) {return true}
}
// Return composite
return false
}
// It returns false if n is composite and returns true if n
// is probably prime. k is an input parameter that determines
// accuracy level. Higher value of k indicates more accuracy.
func isPrime(_ n: Int, _ k: Int) -> Bool
{
// Corner cases
if (n <= 1 || n == 4) {return false}
if (n <= 3) {return true}
// Find r such that n = 2^d * r + 1 for some r >= 1
var d = n - 1
while (d % 2 == 0){
d /= 2
}
// Iterate given number of 'k' times
//for (int i = 0; i < k; i++)
for i in 0..<k{
if (!miillerTest(d, n)){
return false
}
}
return true
}
1. 首先在HTML head加上：
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
2. document.getElementById("demo")可用$('#demo')[0]取代，例如：
document.getElementById("demo").innerHTML = "Hello JavaScript!";
可寫成：
$("#demo")[0].innerHTML = "Hello JavaScript!";
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