Returning strings based off other strings, need help.

[vysero]

I was hoping someone could guide me to the best solution to a problem I am having. I need to write some code that will return a specific string based on another string. Essentially if the string I have is "X" then I need a way of identifying "X" and returning "Y".

The strings won't actually be "X" or "Y", that's just an example. Currently I am using a case statement but it feels messy. Is this a good job for a hash map? I will give some pseudo code below on what I am currently doing:

  string x = "";

  function whatIsString(theString)
  {
    switch(string)
    {
      case "A":
         x = "xyz"
         break
      case "B":
         x = "zyx"
         break
      default:
         x = theString
    }
   return x;
  }

So.. in short, is there a better (or more common) way of doing what I did above? The other option I can think of would be to just do a series of if statements but I figured a switch statement would be better than that... perhaps that is an incorrect assumption.

[lastchance]

std::map<string,string>