到目前为止，这是我的代码;
class Program
{
static void Main(string[] args)
{
//create empty arrays
int[] votes = new int[5];
string[] names = { "Ahmed", "Boo", "Celine", "Didi", "Elaine" };
for (int i = 0; i < names.Length; i++)
{
Console.WriteLine("{0} {1}", i, names[i]);
}
//input votes
Input(votes);
//sort votes
Sort(votes, names);
if (votes[0] > 0)//If there are any votes for the top candidate then do not display the output
{
//output sorted data
Console.WriteLine("\nVote summary");
Output(votes, names);
Console.WriteLine("\nIn third place: {0}", names[2]);
Console.WriteLine("In second place: {0}", names[1]);
Console.WriteLine("And the winner is: {0}", names[0]);
}
else
{
Console.WriteLine("No votes were made!");
}
Console.ReadLine();
}//end Main
static void Input(int[] arr)
{
int vote = EnterInt("Enter number of candidate you wish to vote for (0 to 4) or -1 to quit:");
while (vote != -1)
{
if (vote < 0 || vote > 4)
{
Console.WriteLine("Invalid vote");
}
else
{
arr[vote]++;
}
vote = EnterInt("Enter number of candidate you wish to vote for (0 to 4) or -1 to quit:");
}//end while
}//end InputArray
public static void Sort(int[] votes, string[] names)
{
for (int pass = 1; pass < votes.Length; pass++)
{
int smallestPos = FindSmallest(votes, votes.Length - pass);
if (smallestPos != votes.Length - pass)
{
Swap(votes, smallestPos, votes.Length - pass);
Swap(names, smallestPos, votes.Length - pass);
}
}//end for
}//end Sort
public static int FindSmallest(int[] votes, int num)
{
int smallestPos = 0;
for (int i = 1; i <= num; i++)
{
if (votes[i] < votes[smallestPos])
{
smallestPos = i;
}
}//end for
return smallestPos;
}//end FindSmallest
public static void Swap(int[] votes, int first, int second)
{
int temp = votes[first];
votes[first] = votes[second];
votes[second] = temp;
}//end Swap
public static void Swap(string[] names, int first, int second)
{
string temp = names[first];
names[first] = names[second];
names[second] = temp;
}//end Swap
public static void Output(int[] votes, string[] names)
{
for (int i = 0; i < votes.Length; i++)
{
Console.WriteLine("{0} {1}", names[i], votes[i]);
}//end for
}//end Output
static int EnterInt(string prompt)
{
Console.Write(prompt);
int num;
while (!int.TryParse(Console.ReadLine(), out num))
{
Console.Write("Error! Please enter an integer number:");
}//end while
return num;
}
}
感谢您的帮助。
答案 0 :(得分：0)
首先，我建议您使用单一集合来存储所有候选人姓名及其投票数（由评论中的@Sinatr建议），因为它使代码更加简单使用方便的Linq函数，如.OrderBy（）。
要实现这一目标，您可以使用许多选项，您可以使用名称和投票属性创建自己的候选类，或者您可以使用已经预定义的类型，例如元组（字符串，整数）或字典，就像我在示例代码中使用的那样。
正如你所注意到的，这个问题的难点在于以最多票数对三位候选人的投票排名进行排序。我使用的方法是分组候选人相同的投票数，然后将这些组从最高票数到最低票数进行排序。之后，我继续检索候选人的名字，同时保持在积分榜上显示的最大名字数量的计数器，即3。
我尽量使代码尽可能简单，同时保留大部分结构，如果您有任何疑问，请告诉我。
class Program
{
static Dictionary<string, int> candidates; //Make the variable accesible from any method for simplicity
static void Main(string[] args)
{
//initialize dictionary
candidates = new Dictionary<string, int>();
candidates.Add("Ahmed", 0);
candidates.Add("Boo", 0);
candidates.Add("Celine", 0);
candidates.Add("Didi", 0);
candidates.Add("Elaine", 0);
//Print candidate names
for (int i = 0; i < candidates.Count; i++)
{
Console.WriteLine("{0} {1}", i, GetCandidate(i));
}
//input votes
Input();
//output votes if highest vote candidate has any
if (candidates.Max(c => c.Value) > 0)
{
Console.WriteLine("Vote summary");
Output();
//to arrange the standings we need to group the candidates to evaluate if they share the same amount of votes
//additionally I choose to skip the group of candidates who have 0 votes, as there is no point on displaying them
var grouped_candidates = candidates.GroupBy(c => c.Value).Where(g => g.Key > 0).OrderByDescending(g => g.Key);
//we can only display 3 names in the standings so we set a counter
int standing_spots = 3;
string firstplace = string.Empty, secondplace = string.Empty, thirdplace = string.Empty;
//retrieve winner(s)
var first_group = grouped_candidates.ElementAt(0);
var winner_names = first_group.Select(c => c.Key);
firstplace = GetStandings("In first place: ", standing_spots, winner_names);
//retrieve second position(s)
var second_group = grouped_candidates.ElementAtOrDefault(1);
if (second_group != null)
{
var second_names = second_group.Select(c => c.Key);
secondplace = GetStandings("In second place: ", standing_spots, second_names);
}
//retrieve third position(s)
var third_group = grouped_candidates.ElementAtOrDefault(2);
if (third_group != null)
{
var third_names = grouped_candidates.ElementAtOrDefault(2).Select(c => c.Key);
thirdplace = GetStandings("In third place: ", standing_spots, third_names);
}
//Print standings
if (!string.IsNullOrEmpty(thirdplace)) { Console.WriteLine(thirdplace); }
if (!string.IsNullOrEmpty(secondplace)) { Console.WriteLine(secondplace); }
Console.WriteLine(firstplace);
}
else
{
Console.WriteLine("No votes were made!");
}
Console.ReadLine();
}
static string GetStandings(string standing_txt, int standing_spots, IEnumerable<string> names)
{
if (standing_spots > 0)
{
if (names.Count() >= standing_spots)
{
standing_txt += string.Join("+", names.Take(standing_spots));
standing_spots = 0;
}
else
{
standing_txt += string.Join("+", names);
standing_spots -= names.Count();
}
}
return standing_txt;
}
static string GetCandidate(int index)
{
return candidates.ElementAt(index).Key;
}
static void Input()
{
int cand_num;
do
{
cand_num = EnterInt("Enter number of candidate you wish to vote for (0 to 4) or -1 to quit:");
if (cand_num >= 0 && cand_num <= 4)
{
candidates[GetCandidate(cand_num)]++; //increment candidate vote value
}
else if (cand_num != -1)
{
Console.WriteLine("Invalid vote");
}
} while (cand_num != -1);
}
public static void Output()
{
foreach (var candidate in candidates)
{
Console.WriteLine("{0} {1}", candidate.Key, candidate.Value);
}
}
static int EnterInt(string prompt)
{
Console.Write(prompt);
int num;
while (!int.TryParse(Console.ReadLine(), out num))
{
Console.Write("Error! Please enter an integer number:");
}
return num;
}
}