A program to match people up randomly with other people for a chess tournament.

Chess Tournament

//Chess tournament program
//a matchmaking program by Andrenator

#include <iostream>
#include <string>
using namespace std ;

void displayScores () ;  //le functions
void displayTierArray () ;
void displayTierBattles ( int ) ;
int findPlayer (int ) ;

const int NumOfPlayers = 8 ;  //the hub of the program, lolz.  Replace 8 with number of players

int scoreArray[NumOfPlayers] ;
string nameArray[NumOfPlayers] ;
int tierCount[NumOfPlayers] ;
int seedNumber ;

int main ( )
{
	string yesNo ;

	cout << "Enter the player names, please." << endl ;
	for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
	{
		cout << "Player " << loopNum + 1 << "'s name: " ;
		cin >> nameArray[loopNum] ;
	}

	//if players have scores, enter them.  if not, everyone gets a 1
	do
	{
		cout << "Do the players have existing scores (y/n)? " ;
		cin >> yesNo ;
	} while (yesNo != "y" && yesNo != "n" ) ;

	if (yesNo == "n")
	{
		for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
			scoreArray[loopNum] = 1 ;
	}
	else
	{	
		for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
		{
			cout << nameArray[loopNum] << "'s score: " ;
			cin >> scoreArray[loopNum] ;
		}
	}

	cout << endl ;
	displayScores () ;

	//this loop generates an array, tierCount, that counts how many people are in each tier
	for (int scoreLooking = 1; scoreLooking <= NumOfPlayers; scoreLooking++)
	{
		for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
		{
			if (scoreArray[loopNum] == scoreLooking)
				tierCount[scoreLooking - 1]++ ;
		}
	}

	cout << endl ;
	displayTierArray () ;

	cout << "\nPlease enter a random seed number (an integer, but the date and time works well): " ;
	cin >> seedNumber ;

	//this loop inputs the tier number into the function displayTierBattle, up to the maximum tier
	for (int loopNum = 1; loopNum <= NumOfPlayers; loopNum++ )
	{
		if (tierCount[loopNum - 1] > 0)
		{
			cout << "\nTier " << loopNum << " battles:" << endl ;
			displayTierBattles (loopNum) ;
		}
	}

	system ("pause") ;
	return 0 ;
}

void displayScores ()
{
	for (int loopNum = 0 ; loopNum < NumOfPlayers ; loopNum++)
	{
		cout << nameArray[loopNum] << ": " ;
		cout << scoreArray[loopNum] ;
		cout << endl ;
	}
}

void displayTierArray ()
{
	for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
	{
		cout << loopNum + 1 << "-" << tierCount[loopNum] ;
		if (loopNum < NumOfPlayers - 1)
			cout << ", " ;
		else
			cout << endl ;
	}
}

void displayTierBattles (int matchLevel )
{
	for (tierCount[matchLevel - 1]; tierCount[matchLevel - 1] != 0;)
	{
		if (tierCount[matchLevel - 1] % 2 == 1)  //if there's an odd number, one guy will be sitting it out.
		{
			cout << nameArray[findPlayer ( matchLevel)] << " will be sitting this one out." << endl ;
		}
		else  //if there's an even number, the loop proceeds to match people up two at a time
		{
			cout << "*** " ;
			cout << nameArray[findPlayer (matchLevel)] ;
			cout << " shall hereby battle " ;
			cout << nameArray[findPlayer (matchLevel)] ;
			cout << "! ***" << endl ;
		}
	}
}

int findPlayer (int matchLevel)
{
	int thisHereRandomNum = rand () % tierCount[matchLevel - 1] ;
	for (int loopNum = 0; loopNum < NumOfPlayers; loopNum++)
	{
		if (scoreArray[loopNum] == matchLevel)
		{
			if (thisHereRandomNum == 0)
			{
				tierCount[matchLevel - 1]-- ;
				scoreArray[loopNum] = 0 ;
				return loopNum ;
			}
			thisHereRandomNum-- ;
		}
	}
}