Zu den Bitoperatoren gehören:
| & | AND (UND) |
| &= | AND (UND) |
| | | OR (ODER) |
| |= | OR (ODER) |
| ^ | XOR(Exklusiv-ODER) |
| ^= | XOR (Exklusiv-ODER |
| ~ | Einerkomplement |
| << | Shift Left (Linksschieben |
| << | Shift Left (Linksschieben) |
| >>= | Shift Right (Rechtsschieben) |
| >>= | Shift Right (Rechtsschieben) |
Diese Operationen erfordern zwei Operanden und führen Bitvergleiche durch.
AND & kopiert ein Bit zum Ergebnis, wenn es in beiden Operanden gleich 1 ist.
main()
{
unsigned int a = 60; /* 60 = 0011 1100 */
unsigned int b = 13; /* 13 = 0000 1101 */
unsigned int c = 0;
c = a & b; /* 12 = 0000 1100 */
}
|
OR | kopiert ein Bit zum Ergebnis, wenn es in mindestens einem Operanden gleich 1 ist..
main()
{
unsigned int a = 60; /* 60 = 0011 1100 */
unsigned int b = 13; /* 13 = 0000 1101 */
unsigned int c = 0;
c = a | b; /* 61 = 0011 1101 */
}
|
XOR ^ kopiert ein Bit zum Ergebnis, wenn es in einem (nicht beiden) Operand gleich 1 ist..
main()
{
unsigned int a = 60; /* 60 = 0011 1100 */
unsigned int b = 13; /* 13 = 0000 1101 */
unsigned int c = 0;
c = a ^ b; /* 49 = 0011 0001 */
}
|
Try it out with one of these simulators.
This operator is unary (requires one operand) and has the efect of 'flipping' bits.
main()
{
unsigned int Value=4; /* 4 = 0000 0100 */
Value = ~ Value; /* 251 = 1111 1011 */
}
|
Try it out
The following
operators can be used for shifting bits left or right.| << | >> | <<= | >>= |
The left operands value is moved left or right by the number of bits specified by the right operand. For example:
main()
{
unsigned int Value=4; /* 4 = 0000 0100 */
unsigned int Shift=2;
Value = Value << Shift; /* 16="0001" 0000 */ Value <<="Shift;" /* 64="0100" 0000 */ printf("%d\n", Value); /* Prints 64 */ }
|
Usually, the resulting 'empty' bit is assigned ZERO. Please use unsigned variables with these operators to avoid unpredictable results.
Try it out with one of these silulators
Bit shifting problem.