C#检查重复键和汇总值

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Dictionary<string, int> keyValuePairs = new Dictionary<string, int>();

        // 添加键值对
        AddKeyValuePair(keyValuePairs, "key1", 10);
        AddKeyValuePair(keyValuePairs, "key2", 20);
        AddKeyValuePair(keyValuePairs, "key3", 30);
        AddKeyValuePair(keyValuePairs, "key1", 40); // 重复键

        // 输出汇总值
        foreach (var pair in keyValuePairs)
        {
            Console.WriteLine($"Key: {pair.Key}, Value: {pair.Value}");
        }
    }

    static void AddKeyValuePair(Dictionary<string, int> keyValuePairs, string key, int value)
    {
        if (keyValuePairs.ContainsKey(key))
        {
            // 键已存在，进行值的汇总
            keyValuePairs[key] += value;
        }
        else
        {
            // 键不存在，直接添加键值对
            keyValuePairs.Add(key, value);
        }
    }
}