C# 程序查找数组是否包含重复项
csharpprogrammingserver side programming更新于 2025/9/17 20:24:00
设置数组 −
int[] arr = {
89,
12,
56,
89,
};
现在，创建一个新的 Dictionary −
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;
}
这是完整的代码 −
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
