//  This program has several errors that are to be found.
//
//  Here is a requirements overview for this program
//  There has just been a hotly contested city council election.
//  In four voting precincts, citizens have cast their ballots for four
//  candidates.  We wish to analyze the votes for these four candidates
//  by determining how many votes each candidate received in each precinct,
//  how manyh total votes each candidate received, and how many total votes
//  were cast in each precinct.
//  Input:  An arbitrary number of votes in a file voteFile with each 
//  vote represented as a pair of numbers: a precinct number ( 1 through
//  4), and a candidate number ( 1 through 4); and candidate names, 
//  entered through the keyboard to be used for output.
//  Output:  A file reportFile containing: a table showing how many votes
//   each candidate recieved in each precinct,  the total number of votes
//  for each candidate, and the total number of votes cast in each precinct.

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>
const int NUM_PRECINCTS = 4;
const int NUM_CANDIDATES = 4;

typedef char String10[11];  // 10 chars plus string terminator
typedef int VoteTable[NUM_PRECINCTS] [NUM_CANDIDATES];

void GetNames( String10[]);
void OpenForInput ( ifstream& );
void OpenForOutput ( ofstream& );
void WritePerCandidate ( const VoteTable, const String10[ ], ofstream&);
void WritePerPrecinct ( const VoteTable, ofstream& );
void WriteTable ( const VoteTable, const String10[], ofstream&);
void ZeroVotes ( VoteTable);

int main ( ) 
{
	VoteTable votes;  // Totals for precincts versus candidates
	String10 name[NUM_CANDIDATES];  // Candidate names
	int candidate;  // candidate number from voteFile
	int precinct;  // Precinct number from voteFile
	ifstream voteFile;  // Input number of precincts, candidates
	ofstream reportFile;  // Output file for summaries

	OpenForInput (voteFile);
	if ( !voteFile)
		return 1;
	OpenForOutput ( reportFile);
	if ( !reportFile)
		return 1;
	GetNames (name);
	ZeroVotes ( votes );

	// Read and tally votes
	voteFile >> precinct >> candidate;
	while (voteFile)
	{
		votes[precinct ] [candidate ]++;
		voteFile >> precinct >> candidate;

	}

	// Write results to report file
	WriteTable ( votes, name, reportFile);
	WritePerCandidate ( votes, name, reportFile);
	WritePerPrecinct (votes, reportFile);
	return 0;
	}

	void OpenForInput ( ifstream& someFile)
	//  Prompts for name of input file and opens it
	// Postcondition: 
	//  The user has been prompted for a file name and 
	//  if the file could not be opened, an error message
	//  has been displayed.
	//  Note: Upon return, the caller must test stream state
	{
	char fileName[51];  // User-specified file name of 50 chars or less
	cout << " Input File Name:  ";
	cin.get(fileName, 51 );
	cin.ignore ( 100, '\n');
	someFile.open(fileName);
	if (!someFile)
		cout << " *** Can't open " << fileName << "  ***" << endl;
	}

	void OpenForOutput ( ofstream someFile)
	//  Prompts for name of output file and opens it
	//  Postcondition:
	//  The user has been prompted for a file name
	//  and If the file could not be opened, an error message
	//  has been displayed.
	//  Note: Upon return, the caller must test stream state
	{
	char fileName[51];  // User specified file name of no more than 50
	cout << "Output file name:  ";
	cin.get (fileName, 51);
	cin.ignore ( 100, '\n');
	someFile.open(fileName);
	if ( !someFile)
		cout << " *** Can't open " << fileName << " *** " << endl;
	}

	void GetNames ( String10 name[ ] )
	{
	int candidate;  //  Loop counter
	cout << " ENter the names of the candidates, one per line. "
		<< endl << " in the order they appear on the ballot."
		<< endl;
	for ( candidate = 0; candidate < NUM_CANDIDATES; candidate++)
	{
		cin.get (name[candidate], 11);
		cin.ignore(100, '\n');
	}
	}


	void ZeroVotes ( VoteTable votes )
	{
	int precinct;	// Loop counter
	int candidate;  // Loop counter
	for ( precinct =1; precinct < NUM_PRECINCTS; precinct++)
		for ( candidate=0; candidate < NUM_CANDIDATES; candidate++)
			votes[precinct] [candidate] = 0;
	}

	void WriteTable ( const VoteTable votes, const String10 name[ ],
		ofstream& reportFile)
	{
	int precinct;   // Loop counter
	int candidate;  // Loop counter

	// Set up headings
	reportFile << "           ";
	for ( candidate =0; candidate < NUM_CANDIDATES; candidate++)
		reportFile << setw(12) << name[candidate];
	reportFile << endl;

	// Print table of total votes by row
	for (precinct = 0; precinct < NUM_PRECINCTS; precinct++)
	{
		reportFile << "Precinct" << setw(4) << precinct + 1;
		for ( candidate =0; candidate < NUM_CANDIDATES; 
					candidate++)
			reportFile << setw(12) << votes[precinct]
					[candidate];
		reportFile << endl;
	}

	void WritePerCandidate ( const VoteTable votes,
		const String10 name[ ], ofstream& reportFile )
	{
		int precinct;   // Loop counter
		int candidate;  // Loop counter
		int total;   // Total votes for a candidate
		for (candidate = 0; candidate < NUM_CANDIDATES;
			candidate++)
		{
			total = 0;
		// Computer column sum
			for ( precinct = 0; precinct < NUM_PRECINCTS;
				precinct++)
				total = total + votes[candidate][precinct];
			reportFile << "Total votes for " << setw(10)
				<< name[candidate] << ":" << setw(3)
				<< total << endl;
		}
		reportFile << endl;
	}

void WritePerPrecinct ( const VoteTable votes,
		ofstream& reportFile)
	{
	int precinct;   // Loop counter
	int candidate;  // Loop counter
	int total;	// Total votes for a precinct

	for ( precinct = 0; precinct << NUM_PRECINCTS; precints++)
		{
		total = 0;
		// Compute row sum
		for ( candidate = 0; candidate <= NUM_CANDIDATES; candidate++)
			total = total + votes [ precinct] [ candidate];
		reportFile << "Total votes for precinct "
			<< setw(3) << precinct  << ": "
			<< setw(3) << total << endl;
		}
	}