字符串反转

#include "string"
#include "stdio.h"
#include "iostream"
using namespace std;
void myreverse(string &str,int left,int right)
{
    while(left<right)
    {
        char temp=str[left];
        str[left]=str[right];
        str[right]=temp;
        left++;
        right--;
    }

}
void rotateString(string &str,int offset)
{
    if(str.size()==0)
        return;
    int len=str.size();
    offset%=len;
    myreverse(str,0,len-offset-1);
    myreverse(str,len-offset,len-1);
    myreverse(str,0,len-1);

}

int main()
{
    string str;
    int offset;
    cin>>str;
    cin>>offset;
    rotateString(str,offset);
    return 0;
}