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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>Bitset Operators</title> <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="../index.html">cppreference.com</a> > <a href= "index.html">C++ Bitsets</a> > <a href= "biset_operators.html">Bitset Operators</a> </div> <div class="name-format"> Bitset Operators </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> #include <bitset> !=, ==, &=, ^=, |=, ~, <<=, >>=, []</pre> <p>These operators all work with bitsets. They can be described as follows:</p> <ul> <li>!= returns true if the two bitsets are not equal.</li> <li>== returns true if the two bitsets are equal.</li> <li>&= performs the AND operation on the two bitsets.</li> <li>^= performs the XOR operation on the two bitsets.</li> <li>|= performs the OR operation on the two bitsets.</li> <li>~ reverses the bitset (same as calling flip())</li> <li><<= shifts the bitset to the left</li> <li>>>= shifts the bitset to the right</li> <li>[x] returns a reference to the xth bit in the bitset.</li> </ul> <p>For example, the following code creates a bitset and shifts it to the left 4 places:</p> <pre class="example-code"> // create a bitset out of a number bitset<8> bs2( (long) 131 ); cout << "bs2 is " << bs2 << endl; // shift the bitset to the left by 4 digits bs2 <<= 4; cout << "now bs2 is " << bs2 << endl; </pre> <p>When the above code is run, it displays:</p> <pre class="example-code"> bs2 is 10000011 now bs2 is 00110000 </pre> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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