Reversed Strings

zltzlt

Complete the solution so that it reverses the string value passed into it.

solution('world'); // returns 'dlrow'

#include <string>
using namespace std; 

string reverseString (string str )
{
    string res = "";
    for (int i = (str.size() - 1); i >= 0; i--)
    {
        res += str[i];
    }
    return res;
}