Use the generic rotate algorithm : rotate « STL Algorithms Modifying sequence operations « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Modifying sequence operations
3. rotate

#include <iostream>
#include <cassert>
#include <algorithm>
#include <vector>
#include <string>
using namespace std;

int main()
{
  string s("Software Engineering ");
  vector<char> vector1(s.begin(), s.end());

  // Rotate the vector so that "Engineering " comes first:
  rotate(vector1.begin(), vector1.begin() + 9,vector1.end());


  for(int i=0;i<vector1.size();i++){
     cout << vector1[i] ;
  }
  return 0;
}

Engineering Software