c++ please

In the preceding problem, you determined whether the ith character of a string str occurs exactly once in the string. Now you are ready to solve the original problem, to print all characters that occur exactly once. Rearrange the following lines of code to produce a solution. Because ch is not needed outside the while loop, declare it inside. Mouse: Drag/drop Keyboard Grabitelease spacebar (or Eater) Move +1.1[ Cancel [Eol