#pragma once
#include "ranking.h"

const int DefaultSize = 10; // default starting size of the rankings array

// give the user a description of the program behaviour
void welcome();

// check a filename is non-empty and contains only valid characters
// return true iff good
bool okfilename(string fname);

// check the user passed one argument, to be used as a filename
bool checkUsage(int numArgs, char *arguments[]);

// ask the user how many head-to-head matchups to run
// and return the valid response
// (must be a positive integer, repeat until valid)
int getNumMatches();