1.2字符串 原串翻转

class Reverse {
public:
    string reverseString(string iniString) {
        // write code here
        string::iterator b=iniString.begin();
        string::iterator e=iniString.end();
        e--;
        while(b<e)
        {
            swap(*b++,*e--);   
        }
        return iniString;
    }
};