C# 中的 Array.BinarySearch(Array, Object) 方法示例
csharpserver side programmingprogramming更新于 2025/9/14 10:17:00
C# 中的 Array.BinarySearch(Array, Object) 方法用于在整个一维排序数组中搜索特定元素，使用数组的每个元素和指定对象实现的 IComparable 接口。
语法
public static int BinarySearch (Array arr, object val);
上面，arr 是排序的一维数组，而 val 是要搜索的对象。
示例
using System;
public class Demo {
public static void Main() {
int[] intArr = {5, 10, 15, 20};
Array.Sort(intArr);
Console.WriteLine("数组元素...");
foreach(int i in intArr) {
Console.WriteLine(i);
}
Console.Write("Element 25 is at index = " + Array.BinarySearch(intArr, 20));
}
}
输出
Array elements... 5 10 15 20 Element 25 is at index = 3
示例
using System;
public class Demo {
public static void Main() {
string[] strArr = {"John", "Tim", "Fedric", "Gary", "Harry", "Damien"};
Array.Sort(strArr);
Console.WriteLine("数组元素...");
foreach(string s in strArr) {
Console.WriteLine(s);
}
Console.Write("Element Gary is at index = " + Array.BinarySearch(strArr, "Gary"));
Console.Write("
Element Tom is at index = " + Array.BinarySearch(strArr, "Tom"));
}
}
输出
Array elements... Damien Fedric Gary Harry John Tim Element Gary is at index = 2 Element Tom is at index = -7
