24 lines
1.1 KiB
C++
24 lines
1.1 KiB
C++
#include <iostream>
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void bitwise(int a, int b)
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{
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std::cout << "a and b: " << (a & b) << '\n'; // Note: parentheses are needed because & has lower precedence than <<
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std::cout << "a or b: " << (a | b) << '\n';
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std::cout << "a xor b: " << (a ^ b) << '\n';
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std::cout << "not a: " << ~a << '\n';
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// Note: the C/C++ shift operators are not guaranteed to work if the shift count (that is, b)
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// is negative, or is greater or equal to the number of bits in the integer being shifted.
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std::cout << "a shl b: " << (a << b) << '\n'; // Note: "<<" is used both for output and for left shift
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std::cout << "a shr b: " << (a >> b) << '\n'; // typically arithmetic right shift, but not guaranteed
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unsigned int ua = a;
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std::cout << "a lsr b: " << (ua >> b) << '\n'; // logical right shift (guaranteed)
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// there are no rotation operators in C++, but as of c++20 there is a standard-library rotate function.
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// The rotate function works for all rotation amounts, but the integer being rotated must always be an
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// unsigned integer.
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std::cout << "a rol b: " << std::rotl(ua, b) << '\n';
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std::cout << "a ror b: " << std::rotr(ua, b) << '\n';
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}
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