我需要一段哈希表的c++代码

以下是一个基于链表的哈希表的C代码示例：

#include <stdio.h>  
#include <stdlib.h>  
#include <string.h>  

#define HASH_SIZE 1000  

typedef struct Node {
    char *key;
    int value;
    struct Node *next;
} Node;

Node *hashTable[HASH_SIZE];

// 哈希函数
unsigned int hash(const char *key) {
    unsigned long hashVal = 0;
    while(*key != '\0') {
        hashVal = (hashVal << 4) + *key++;
        unsigned long g = hashVal & 0xF0000000;
        if (g != 0) {
            hashVal ^= g >> 24;
        }
        hashVal &= ~g;
    }
    return hashVal % HASH_SIZE;
}

// 查找键对应的值
int get(const char *key) {
    unsigned int pos = hash(key);
    Node *p = hashTable[pos];
    while(p != NULL) {
        if(strcmp(p->key, key) == 0) {
            return p->value;
        } else {
            p = p->next;
        }
    }
    return -1;
}

// 插入键值对
void put(const char *key, int value) {
    unsigned int pos = hash(key);
    Node *p = hashTable[pos];
    while(p != NULL) {
        if(strcmp(p->key, key) == 0) {
            p->value = value;
            return;
        } else {
            p = p->next;
        }
    }
    Node *newNode = (Node*)malloc(sizeof(Node));
    newNode->key = (char*)malloc(strlen(key) + 1);
    strcpy(newNode->key, key);
    newNode->value = value;
    newNode->next = hashTable[pos];
    hashTable[pos] = newNode;  
}

int main() {
    put("apple", 5);
    put("orange", 8);
    printf("%d\n", get("apple"));
    printf("%d\n", get("banana"));  
    return 0;
}