c# Array.IndexOf(Array,item) 如果没有匹配则需要最接近的项

# 在C#中查找最接近项的方法

csharp
using System;
class Program
{
    static void Main()
    {
        // 示例数组
        int[] array = { 10, 20, 30, 40, 50 };
        // 目标项
        int target = 22;
        // 初始化最小差异和对应索引
        int minDifference = int.MaxValue;
        int closestIndex = -1;
        // 遍历数组计算差异
        for (int i = 0; i < array.Length; i++)
        {
            int difference = Math.Abs(array[i] - target);
            // 更新最小差异和索引
            if (difference < minDifference)
            {
                minDifference = difference;
                closestIndex = i;
            }
        }
        // 输出结果
        Console.WriteLine($"目标项：{target}");
        Console.WriteLine($"最接近项：{array[closestIndex]}");
        Console.WriteLine($"最接近项的索引：{closestIndex}");
    }
}