题解 | #左旋转字符串#

class Solution {
public:
    string LeftRotateString(string str, int n) {
        if(str.size()==0)
        {
            return str;
        }
        string s1;
        float m=0.0;
        m=n%str.size();
       if(m==0.0)
       {
        return str;
       }
      s1.append(str,0,m);
       string s2;
       s2.append(str,m,str.size()-m);
       s2.append(s1,0,s1.size());
       return s2;

      
        
    }
};