C# 嗨，我想做一个百分比计算器。我有一个数组，我想看看每个元素出现的次数

我想做一个百分比计算器。我有一个数组，我想看看每个元素出现的次数，然后除以总出现次数得到一个百分比。所以我想要一个如下的输出： */ 1 = 12% */ 2 = 15%

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试着这样做：

int[] n1 = { 1, 2, 3, 4, 5, 6, 1, 2, 4, 5, 6, 3, 1, 2, 5, 6 };

int c = n1.Count();

var keyValue = n1.GroupBy (n => n).Select (n=> new KeyValuePair<int,string>(n.Key,((decimal)n.Count()/(decimal)c).ToString("0.0%")));

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如果您首先访问FAQ，您可能会发现您在这里的体验更好，尤其是

int[] n1 = { 1, 2, 3, 4, 5, 6, 1, 2, 4, 5, 6, 3, 1, 2, 5, 6 };

int c = n1.Count();

var keyValue = n1.GroupBy (n => n).Select (n=> new KeyValuePair<int,string>(n.Key,((decimal)n.Count()/(decimal)c).ToString("0.0%")));

Key = 1, Value = 18.8%
Key = 2, Value = 18.8%
Key = 3, Value = 12.5%
Key = 4, Value = 12.5%
Key = 5, Value = 18.8%
Key = 6, Value = 18.8%