| public static log2 ( int x ) : int | ||
| x | int | The value to calculate log2 on. /// /// |
| Résultat | int | |
public static int log2(int x)
{
int y, v;
// No log of 0 or negative
if (x <= 0)
{
throw new System.ArgumentException("" + x + " <= 0");
}
// Calculate log2 (it's actually floor log2)
v = x;
y = - 1;
while (v > 0)
{
v >>= 1;
y++;
}
return y;
}