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#include <cs50.h>
#include <stdio.h>
#include <string.h>
// Max number of candidates
#define MAX 9
// Candidates have name and vote count
typedef struct
{
string name;
int votes;
} candidate;
// Array of candidates
candidate candidates[MAX];
// Number of candidates
int candidate_count;
// Function prototypes
bool vote(string name);
void print_winner(void);
int main(int argc, string argv[])
{
// Check for invalid usage
if (argc < 2)
{
printf("Usage: plurality [candidate ...]\n");
return 1;
}
// Populate array of candidates
candidate_count = argc - 1;
if (candidate_count > MAX)
{
printf("Maximum number of candidates is %i\n", MAX);
return 2;
}
for (int i = 0; i < candidate_count; i++)
{
candidates[i].name = argv[i + 1];
candidates[i].votes = 0;
}
int voter_count = get_int("Number of voters: ");
// Loop over all voters
for (int i = 0; i < voter_count; i++)
{
string name = get_string("Vote: ");
// Check for invalid vote
if (!vote(name))
{
printf("Invalid vote.\n");
}
}
// Display winner of election
print_winner();
}
// Update vote totals given a new vote
bool vote(string name)
{
for (int i = 0; i < candidate_count; i++)
{
if (name == candidates[i].name)
{
candidates[i].votes++;
return true;
}
}
return false;
}
// Print the winner (or winners) of the election
void print_winner(void)
{
string winners[candidate_count - 1];
winners[0] = candidates[0].name;
for (int i = 1; i < candidate_count - 1; i++)
{
if (winners[0] < candidates[i].name) // if the new candidate has more votes than all previous
{
// clear the list of winners
for (int j = 1; j < candidate_count - 1; j++)
{
winners[j] = 0;
}
// put it at the start of the new list
winners[0] = candidates[i].name;
}
else if (winners[0] == candidates[i].name)
{
for (int j = 1; j < candidate_count - 1; j++)
{
if (winners[j] == 0)
{
winners[j] = candidates[i].name;
}
}
}
}
return;
}
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