reverse a string

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>

using namespace std;

int main()
{
    string str = "I am Bozhidar dosev.";
    vector<char> data(str.begin(),str.end());
    int a = 0;


    for (int i = str.length()-1; i >-1.; i--)
    {
        cout << data[i];
    }
}