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What's the meaning of ~0 in this code?
Can somebody analyze this code for me?
unsigned int Order(unsigned int maxPeriod = ~0) const
{
Point r = *this;
unsigned int n = 0;
while( r.x_ != 0 && r.y_ != 0 )
{
++n;
r += *this;
if ( n > maxPeriod ) break;
}
return n;
}
630
'\0' is referred to as NULL character or NULL terminator It is the character equivalent of integer 0(zero) as it refers to nothing In C language it is generally used to mark an end of a string.
0 votes. number % 2 == 0 is a valid boolean expression that checks whether number % 2 is equivalent to 0 . For even number s, the result is the value, True .
Binary is a base-2 number system invented by Gottfried Leibniz that's made up of only two numbers or digits: 0 (zero) and 1 (one). This numbering system is the basis for all binary code, which is used to write digital data such as the computer processor instructions used every day.
== 0 means "equal to 0 (zero)".
~0 is the bitwise complement of 0, which is a number with all bits filled. For an unsigned 32-bit int, that's 0xffffffff. The exact number of fs will depend on the size of the value that you assign ~0 to.
188
It's the one complement, which inverts all bits.
~ 0101 => 1010
~ 0000 => 1111
~ 1111 => 0000
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