191. 求1的位数 Number of 1 Bits

Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight).

For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3.

求一个无符号整形转换成二进制后，为1的位数

public int HammingWeight(uint n) {
    int sum = 0;
    while (n > 0)
    {
        if ((n&1) == 1)
        {
            sum++;
        }
        n >>= 1;
    }
    return sum;
}

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