1.2字符串 原串翻转

 1 class Reverse {
 2 public:
 3     string reverseString(string iniString) {
 4         // write code here
 5         string::iterator b=iniString.begin();
 6         string::iterator e=iniString.end();
 7         e--;
 8         while(b<e)
 9         {
10             swap(*b++,*e--);
11         }
12         return iniString;
13     }
14 };