leetcode-Reverse String

反转字符串。

Write a function that takes a string as input and returns the string reversed.

Example:
Given s = “hello”, return “olleh”.

		string reverseString(string s)
                		{
                			if (s.size() == 0)return "";
                
                			int x = 0;
                			int y = s.size() - 1;
                
                			for (int i = 0; i < s.size() / 2; i++,x++,y--)
                			{
                			    s[x] = s[x] ^ s[y];
                				s[y] = s[x] ^ s[y];
                				s[x] = s[x] ^ s[y];;
                
                			}
                			return s;
                		}