Recursive permutations

// PermutationRecursion.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;


void calculate (string str, int left, int right)
{
    if(left == right)
    {
        cout << str << endl;
    }
    else
    {
        for (int i = left; i <= right; i++)
        {
            swap(str[left], str[i]);
            string swapped = str;
            calculate(swapped, left + 1, right);
        }
    }
}

int main()
{
    string str = "ABC";
    int sizeOfString = str.size();
    calculate(str, 0, sizeOfString-1);
}