Question

Using C++ create a function called reverse that accepts a string and returns the string in reverse. Must use the std::string and the iterator.

Answer 1

#include <iostream>

#include <string>

using namespace std;

string reverse(string str){

    string output;

    /*creating an iterator (it) of type string

    * str.end() will point to null char of string

    * hence str.end()-1 will give last char of string

    *

    *  */

    for ( std::string::iterator it=str.end()-1; it>=str.begin(); it--){

        output=output+ *it;

    }

    return output;

}

/* optional tester code*/

int main ()

{

cout<<reverse("TEST STRING");

  return 0;

}