Basic C++ Array Question.

[CornedBee]

If you want to use the STL heavily and don't care if the order of the letters is changed (fantastic becomes acfinst)

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

int main()
{
  string str;
  cin >> str; // read a word
  // sort, so unique works
  sort(str.begin(), str.end());
  // now filter multiple letters and output
  unique_copy(str.begin(), str.end(), ostream_iterator<char>(cout, "");
  // note: str is now sorted but still contains multiple letters
  // if you don't want that, do
  // unique(str.begin(), str.end());
  // which alters str, but doesn't ouput automatically
  return 0;
}