bitset::flip：反转所有位，或者指定的位。

Toggles the value of all the bits in a bitset or toggles a single bit at a specified position.

 

反转：原来是1，反转后就是0；如果原来是0，toggle后就是1.

不带参数调用，就是反转所有位。

带参数，即是从右边数0开始数，反转第几位。（注意：两点 1是从右边数，2是从0开始）

  

// bitset_flip.cpp
// compile with: /EHsc
#include <bitset>
#include <iostream> int main( )
{
    using namespace std;
    bitset<5> b1 ( 6 );     cout << "The collection of bits in the original bitset is: ( "
        << b1 << " )" << endl;     bitset<5> fb1;
    fb1 = b1.flip ( );     cout << "After flipping all the bits, the bitset becomes: ( "
        << fb1 << " )" << endl;     bitset<5> f3b1;
    f3b1 = b1.flip ( 0 );     cout << "After flipping the fourth bit, the bitset becomes: ( "
        << f3b1 << " )" << endl << endl;     bitset<5> b2;
    int i;
    for ( i = 0 ; i <= 4 ; i++ )
    {
        b2.flip(i);
        cout << b2 << "  The bit flipped is in position "
            << i << ".\n";
    }
}

运行结果：

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bitset::flip的含义和用法：_ios

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