用来查找数组中是否包含重复元素的 C# 程序
设置数组 −
int[] arr = { 89, 12, 56, 89, };
现在,创建新的字典 −
var d = new Dictionary < int, int > ();
使用字典方法 ContainsKey(),查找数组中的重复元素 −
foreach(var res in arr) { if (d.ContainsKey(res)) d[res]++; else d[res] = 1; }
以下是完整代码 −
示例
using System; using System.Collections.Generic; namespace Demo { public class Program { public static void Main(string[] args) { int[] arr = { 89, 12, 56, 89, }; var d = new Dictionary < int, int > (); foreach(var res in arr) { if (d.ContainsKey(res)) d[res]++; else d[res] = 1; } foreach(var val in d) Console.WriteLine("{0} occurred {1} times", val.Key, val.Value); } } }
输出
89 occurred 2 times 12 occurred 1 times 56 occurred 1 times
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