class Question
{
public:
      Question (){}
      virtual float getValue () const{}
      virtual void setValue (char entry){}
      virtual void setValue (float entry){}
      virtual ~Question() {}
};

class FiveAnswer : public Question
{
public:
      FiveAnswer (){response = -1;}
      FiveAnswer (char entry) {charToFloat(entry);}
      virtual ~FiveAnswer () {}
		virtual float getValue () const {return response;}
      virtual void setValue (char entry) {charToFloat(entry);}
      virtual void setValue (float entry) {} //error
      virtual float charToFloat (char userEntry) ;
private:
      float response;
};

float FiveAnswer::charToFloat (char userEntry)
{
switch(userEntry)
   {
   case 'a':
   case 'A':
   case '1':    response = 1;   break;
   case 'b':
   case 'B':
   case '2':    response = 2;   break;
   case 'c':
   case 'C':
   case '3':    response = 3;   break;
   case 'd':
   case 'D':
   case '4':    response = 4;   break;
   case 'e':
   case 'E':
   case '5':    response = 5;   break;
   default: response = -1;
   }
return response;
}

class FourAnswer : public Question
{
public:
   FourAnswer (){response = -1;}
   FourAnswer (char entry) {charToFloat(entry);}
   virtual ~FourAnswer () {}
   virtual float getValue () const {return response;}
   virtual void setValue (char entry) {charToFloat(entry);}
   virtual void setValue (float entry) {} //error
   virtual float charToFloat (char userEntry) ;
private:
   float response;
};

float FourAnswer::charToFloat (char userEntry)
{
switch(userEntry)
	{
   case 'a':
   case 'A':
   case '1':    response = 1;   break;
   case 'b':
   case 'B':
   case '2':    response = 2;   break;
   case 'c':
   case 'C':
   case '3':    response = 3;   break;
   case 'd':
   case 'D':
   case '4':    response = 4;   break;
   default: response = -1;
	}
return response;
}

class GridIn : public Question
{
public:
      GridIn () {response = -1;}
      virtual float getValue () const {return response;}
      virtual void setValue (char entry) {}
      virtual void setValue (float entry) ;
      virtual ~GridIn() {}
private:
      float response;
};

void GridIn::setValue (float entry)
{
   if((entry < 0) || (entry >= 10000))
     	response = -1;
   else response = entry;  //entry should be 4 characters long not negative
}