gray code
题目：
The gray code is a binary numeral system where two successive values differ in only one bit.
Given a non-negative integer n representing the total number of bits in the code, print the sequence of gray code. A gray code sequence must begin with 0.
For example, given n = 2, return [0,1,3,2]. Its gray code sequence is:
00 - 0
01 - 1
11 - 3
10 - 2
Note:
For a given n, a gray code sequence is not uniquely defined.
For example, [0,2,3,1] is also a valid gray code sequence according to the above definition.
For now, the judge is able to judge based on one instance of gray code sequence. Sorry about that.
代码如下：
vector<int> grayCode(int n) {
vector<int> result;
int m=1<<n;
for(int i=0;i<m;i++)
{
result.push_back(i^(i>>1));
}
return result;
}
补充：软件开发 , C++ ,
