Thread: Help with writing a function

I am trying to write a function that will take input from the user and compare it to a list of valid entries.

Code:

#include <iostream.h>

char GetChoice(const String, &LegalChoices);

/*Forces the user to enter a character in LegalChoices and returns it
  Post: Character in ValidChoices returned							*/

char *ValidChoices = "ABCabc";

char GetChoice(char *ValidChoices)
{
 char Choice;
 int cx;
 int valid = FALSE;

 while (!valid)
 {
  cout<<"Enter your choice (A, B, or C):";
  cin>>Choice;

  cx = 0;
  while (ValidChoices[cx] != '\0')
  {
   if (Choice == ValidChoices[cx])
   {
    valid = TRUE;
    break;
   }
   cx ++;
  }
  if (!valid) "Invalid Choice";
 }

 return Choice;
}

This is the code I am trying to use in the function. I am getting 3 errors:

Error in this line

Code:

char GetChoice(const String, &LegalChoices);

This line

Code:

 int valid = FALSE;

and this line

Code:

valid = TRUE;

I don't see what I am missing maybe because I have been staring at this for a few hours. Can someone point what I am doing wrong? Or if there is a better way for me to do this. i am using this in many sections of my code and I am just trying to make this easier then writing it multiple times.