#include <cs50.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// Max voters and candidates
#define MAX_VOTERS 100
#define MAX_CANDIDATES 9
// preferences[j] is jth preference for voter i
int preferences[MAX_VOTERS][MAX_CANDIDATES];
// Candidates have name, vote count, eliminated status
typedef struct
{
string name;
int votes;
bool eliminated;
}
candidate;
// Array of candidates
candidate candidates[MAX_CANDIDATES];
// Numbers of voters and candidates
int voter_count;
int candidate_count;
// Function prototypes
bool vote(int voter, int rank, string name);
void tabulate(void);
bool print_winner(void);
int find_min(void);
bool is_tie(int min);
void eliminate(int min);
int main(int argc, string argv[])
{
// Check for invalid usage
if (argc < 2)
{
printf("Usage: runoff [candidate ...]\n");
return 1;
}
// Populate array of candidates
candidate_count = argc - 1;
if (candidate_count > MAX_CANDIDATES)
{
printf("Maximum number of candidates is %i\n", MAX_CANDIDATES);
return 2;
}
for (int i = 0; i < candidate_count; i++)
{
candidates.name = argv;
candidates.votes = 0;
candidates.eliminated = false;
}
voter_count = get_int("Number of voters: ");
if (voter_count > MAX_VOTERS)
{
printf("Maximum number of voters is %i\n", MAX_VOTERS);
return 3;
}
// Keep querying for votes
for (int i = 0; i < voter_count; i++)
{
// Query for each rank
for (int j = 0; j < candidate_count; j++)
{
string name = get_string("Rank %i: ", j + 1);
// Record vote, unless it's invalid
if (!vote(i, j, name))
{
printf("Invalid vote.\n");
return 4;
}
//printf("%i, %i, %s\n", i + 1, j + 1, candidates[preferences[j]].name);
}
}
//printf("complete");
tabulate();
}
/*
// Keep holding runoffs until winner exists
while (true)
{
// Calculate votes given remaining candidates
tabulate();
// Check if election has been won
bool won = print_winner();
if (won)
{
break;
}
// Eliminate last-place candidates
int min = find_min();
bool tie = is_tie(min);
// If tie, everyone wins
if (tie)
{
for (int i = 0; i < candidate_count; i++)
{
if (!candidates.eliminated)
{
printf("%s\n", candidates.name);
}
}
break;
}
// Eliminate anyone with minimum number of votes
eliminate(min);
// Reset vote counts back to zero
for (int i = 0; i < candidate_count; i++)
{
candidates.votes = 0;
}
}
return 0;
}
*/
// Record preference if vote is valid
bool vote(int voter, int rank, string name)
{
//printf("voter no (via local function taking value of voter as argument).: %i, rank selected (via local function taking value of rank as argument) %i\n", voter + 1, rank + 1);
for (int t = 0; t < candidate_count; t++)
{
if(strcmp(name, candidates[t].name) == 0)
{
preferences[voter][rank] = t;
//printf("preference of voter no. %i for rank %i is %s\n", voter + 1, rank + 1, candidates[t].name);
return 4;
}
}
return 0;
}
// Tabulate votes for non-eliminated candidates
void tabulate(void)
{
int vc = 0;
int cc = 0;
for (vc = 0; vc < voter_count; vc++)
{
//candidates[cc].votes = candidates[preferences[vc][0]].votes + 1
printf("no. 1 is %s", candidates[preferences[vc][0]].name);
for (cc = 0; cc < candidate_count; cc++)
{
if (candidates[cc].name == candidates[preferences[vc][0]].name)
{
candidates[cc].votes = candidates[cc].votes + 1;
printf("candidate vote is %i", candidates[cc].votes);
}
}
//int z = max(candidates[cc].votes);
// printf("%i", max(candidates[cc].votes));
}
//for (vc = 0; vc < voter_count; vc++)
//{
//for (cc = 0; cc < candidate_count; cc++)
//{
//if (candidates[cc].name == preferences[vc][cc])
//}
//}
return;
}
/*
// Print the winner of the election, if there is one
bool print_winner(void)
{
// TODO
return false;
}
// Return the minimum number of votes any remaining candidate has
int find_min(void)
{
// TODO
return 0;
}
// Return true if the election is tied between all candidates, false otherwise
bool is_tie(int min)
{
// TODO
return false;
}
// Eliminate the candidate (or candidates) in last place
void eliminate(int min)
{
// TODO
return;
}
*/