C/C++/C#/JAVA/PHP/JAVASCRIPT/PYTHON 中文字串雜湊值(雜湊函數/雜湊表)~二分搜尋法前置動作

資料來源: Copilot

C# Code

using System;

class Program
{
    static int Hash(string str)
    {
        int hash = 0;
        foreach (char c in str)
        {
            hash = (hash << 5) + hash + c;
        }
        return hash;
    }

    static void Main()
    {
        string str = "你好，世界";
        Console.WriteLine("Hash value: " + Hash(str));
    }
}

純C Code

/* Online C Compiler and Editor */
#include <stdio.h>

unsigned int hash(const char *str) {
    unsigned int hash = 0;
    while (*str) {
        hash = (hash << 5) + hash + (unsigned char)(*str);
        str++;
    }
    return hash;
}

int main() {
    const char *str = "你好，世界";
    printf("Hash value: %u\n", hash(str));

    printf("Hash value: %u\n", hash("jash.liao"));     
    return 0;
}

C++ Code

#include <iostream>
#include <string>

unsigned int hash(const std::string &str) {
    unsigned int hash = 0;
    for (char c : str) {
        hash = (hash << 5) + hash + static_cast<unsigned char>(c);
    }
    return hash;
}

int main() {
    std::string str = "你好，世界";
    std::cout << "Hash value: " << hash(str) << std::endl;
    return 0;
}

JAVA Code

public class HashExample {
    public static int hash(String str) {
        int hash = 0;
        for (char c : str.toCharArray()) {
            hash = (hash << 5) + hash + (int) c;
        }
        return hash;
    }

    public static void main(String[] args) {
        String str = "你好，世界";
        System.out.println("Hash value: " + hash(str));
    }
}

PHP Code

<?php
function hashString($str) {
    $hash = 0;
    $length = strlen($str);
    for ($i = 0; $i < $length; $i++) {
        $hash = ($hash << 5) + $hash + ord($str[$i]);
    }
    return $hash;
}

$str = "你好，世界";
echo "Hash value: " . hashString($str) . "\n";
?>

JAVASCRIPT Code

function hashString(str) {
    let hash = 0;
    for (let i = 0; i < str.length; i++) {
        hash = (hash << 5) + hash + str.charCodeAt(i);
    }
    return hash;
}

const str = "你好，世界";
console.log("Hash value: " + hashString(str));

PYTHON Code

def hash_string(s):
    hash = 0
    for c in s:
        hash = (hash << 5) + hash + ord(c)
    return hash

str = "你好，世界"
print("Hash value:", hash_string(str))