C语言问题，交换 64 位值的位对 Swap Pairs of Bits of a 64-bit Value

Question

望各位帮忙看看，现在就想要答案，蟹蟹各位潜水专家，感谢解答，感谢回答，感谢解答。在“PUT YOUR CODE HERE”写内容，前面内容不要改动，按照要求来写。

// swap pairs of bits of a 64-bit value, using bitwise operators

#include <assert.h>
#include <stdint.h>
#include <stdlib.h>

// return value with pairs of bits swapped
uint64_t bit_swap(uint64_t value) {
    // PUT YOUR CODE HERE

    return 42;
}

Answer 1

// swap pairs of bits of a 64-bit value, using bitwise operators
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
// return value with pairs of bits swapped
uint64_t bit_swap(uint64_t value) {
    uint64_t data = 0;
    int a,b,m=0;
    for(int i=0;i<32;i++)
    {
        a = value&1;
        value = value>>1;
        b = value&1;
        value = value>>1;
        m+=2;
        if(b>0)
            data |= (b<<m-2);
        if(a>0)
            data |= (a<<m-1);
    }
    return data;
}