如何使用C#检查数组是否包含重复数字？
首先，设置一个数组-
int[] arr = {
87,
55,
23,
87,
45,
23,
98
};现在声明一个字典并遍历数组，并获取所有元素的计数。您从字典中获得的值显示数字的出现-
foreach(var count in arr) {
if (dict.ContainsKey(count))
dict[count]++;
else
dict[count] = 1;
}让我们看完整的例子-
示例
using System;
using System.Collections.Generic;
namespace Demo {
public class Program {
public static void Main(string[] args) {
int[] arr = {
87,
55,
23,
87,
45,
23,
98
};
var dict = new Dictionary < int, int > ();
foreach(var count in arr) {
if (dict.ContainsKey(count))
dict[count]++;
else
dict[count] = 1;
}
foreach(var val in dict)
Console.WriteLine("{0} occurred {1} times", val.Key, val.Value);
}
}
}