#include
#include
using namespace std;

enum PlayType {Headbutt, Punch, Kick};

PlayType ConversionVal( char );

void GetPlays( ifstream&, ifstream&, PlayType&, PlayType&, bool& );
void PrintBigWinner( int, int );
void ProcessPlays( int, PlayType, PlayType, int&, int& );
void RecordAWin( char, int, int& );

int main()
{

        PlayType playForA;
        PlayType playForB;
        int gameNumber = 0;
        int winsForA = 0;
        int winsForB = 0;
        bool legal;
        ifstream fileA;
        ifstream fileB;

        fileA.open("fileA.dat");
        fileB.open("fileB.dat");

        if( !fileA || !fileB )
        {
            cout << "** Can't open input file(s) **" << endl;
            return 1;
        }

        GetPlays( fileA, fileB, playForA, playForB, legal );
        while( fileA && fileB )
        {
        gameNumber++;
        if( legal )
                   ProcessPlays( gameNumber, playForA, playForB,
winsForA,$
        else
        {
        cout << "Game Number " << gameNumber << " contains an illegal ";
        cout << "play." << endl;
        }
   GetPlays( fileA, fileB, playForA, playForB, legal );
   }

PrintBigWinner( winsForA, winsForB );

return 0;
}

void GetPlays( /* inout */ ifstream& fileA, /*inout */ ifstream& fileB,
/* out */ PlayType& playForA, /* out */ PlayType& playForB, /* out */
bool& legal)

{
        char charForA;
        char charForB;

        fileA >> charForA;
        fileB >> charForB;
        if( !fileA || !fileB);
        return;

        legal = ( charForA=='H' || charForA=='P' || charForA=='K' ) &&
( charForB=='H' || charForB=='P' || charForB=='K' );

        if( legal )
        {
                 playForA = ConversionVal( charForA );
                 playForB = ConversionVal( charForB );
        }
}

PlayType ConversionalVal( /* in */ char someChar )

{
        switch( someChar )
        {
        case 'H': return Headbutt;
        case 'P': return Punch;
        case 'K': return Kick;
        }
}

void ProcessPlays( /* in */ int gameNumber, /* in */ PlayType playForA,
/* in */ PlayType playForB, /* inout */ int& winsForA, /* inout */ int&
winsForB )

{
        if( playForA == playForB )
{
        cout << "Fight Sequence " << gameNumber << " is a tie.";
        cout << endl;
}
       else if( playForA == Punch && playForB == Headbutt || playForA ==
Kick && playForB == Punch || playForA == Headbutt && playForB == Kick )
{
              RecordAWin('A', gameNumber, winsForA);
}
        else
{
              RecordAWin('B', gameNumber, winsForB);
}
}

void RecordAWin( /* in */ char player, /* in */ int gameNumber, /* inout
*/ int& numOfWins)

{
        cout << "Fighter " << player << " has won the fight sequence ";
        cout << gameNumber << "." << endl;
        numOfWins++;
}

void PrintBigWinner( /* in */ int winsForA, /* in */ int winsForB )

{
        cout << "Ted the Lion Heart has won " << winsForA << " fight sequences.";
        cout << endl;
        cout << "Emcee ++ has won " << winsForB << " fight sequences.";
        cout << endl;

        if( winsForA > winsForB )
        {
        cout << "Ted the Lion Heart beat up Emcee ++." << endl;
        cout << "Ted the Lion Heart is the new world champion!!!" << endl;
        }

        else if( winsForB > winsForA )
        {
                cout << "Emcee ++ beat up Ted the Lion Heart." << endl;
                cout << "Emcee ++ is the new world champion!!!" << endl;
        }

        else
{
                cout << "You knocked each other out! Johnny Boy wins!";
                cout << endl;
        }
}


References
Appendix B