Question

我需要在C＃中创建一个列表，以返回面积最大的巴西10个州，但我没有得到正确的金额。该列表必须返回以下结果：巴西十大州：亚马孙州-1,570,745平方公里；帕拉-1,247,689平方千米;马托格罗索州-903,357平方公里;米纳斯吉莱斯州-588,528平方公里;巴伊亚州-564,692平方公里;南马托格罗索州-358,158平方公里；戈亚斯-340,086km²;马拉尼昂-331,983km²;南里奥格兰德州-282,062km²;托康汀-277,620平方公里感激。

using System;
using System.Collections.Generic;

    namespace Brazil
    {
        public class Country
        {
            public State[] Top10StatesByArea()
            {
                string[,] BrazilianStates = {

                    {"AC","Acre","164123,040"},
                    {"AL","Alagoas","27778,506"},
                    {"AP","Amapá","142828,521"},
                    {"AM","Amazonas","1559159,148"},
                    {"BA","Bahia","564773,177"},
                    {"CE","Ceará","148920,472"},
                    {"DF","Distrito Federal","5779,999"},
                    {"ES","Espírito Santo","46095,583"},
                    {"GO","Goiás","340111,783"},
                    {"MA","Maranhão","331937,450"},
                    {"MT","Mato Grosso","903366,192"},
                    {"MS","Mato Grosso do Sul","357145,532"},
                    {"MG","Minas Gerais","586522.122"},
                    {"PA","Pará","1247954,666"},
                    {"PB","Paraíba","56585,000"},
                    {"PR","Paraná","199307,922"},
                    {"PE","Pernambuco","98311,616"},
                    {"PI","Piauí","251577,738"},
                    {"RJ","Rio de Janeiro","43780,172"},
                    {"RN","Rio Grande do Norte","52811,047"},
                    {"RS","Rio Grande do Sul","281730,223"},
                    {"RO","Rondônia","237590,547"},
                    {"RR","Roraima","224300,506"},
                    {"SC","Santa Catarina","95736,165"},
                    {"SP","São Paulo","248222,362"},
                    {"SE","Sergipe","21915,116"},
                    {"TO","Tocantins","277720,520"},

                };

                int states = (BrazilianStates.Length / BrazilianStates.GetLength(1));

                for (int a = 0; a < states; a++)
                {
                    for (int b = a + 1; b < states; b++)
                    {
                        if (Convert.ToDouble(BrazilianStates[b, BrazilianStates.Rank]) > 
                           (Convert.ToDouble(BrazilianStates[a, BrazilianStates.Rank])))
                        {
                            for (int c = 0; c <= BrazilianStates.Rank; c++)
                            {
                                string[,] aux = { { "", "", ""} };
                                aux[0, c] = BrazilianStates[a, c];
                                BrazilianStates[a, c] = BrazilianStates[b, c];
                                BrazilianStates[b, c] = aux[0, c];
                            }
                            Convert.ToString(BrazilianStates);

                        }
                    }
                }
                State[] ArrayBrazilianStates =
                {
                    new State(BrazilianStates[0, 1], BrazilianStates[0,0]),
                    new State(BrazilianStates[1, 1], BrazilianStates[1,0]),
                    new State(BrazilianStates[2, 1], BrazilianStates[2,0]),
                    new State(BrazilianStates[3, 1], BrazilianStates[3,0]),
                    new State(BrazilianStates[4, 1], BrazilianStates[4,0]),
                    new State(BrazilianStates[5, 1], BrazilianStates[5,0]),
                    new State(BrazilianStates[6, 1], BrazilianStates[6,0]),
                    new State(BrazilianStates[7, 1], BrazilianStates[7,0]),
                    new State(BrazilianStates[8, 1], BrazilianStates[8,0]),
                    new State(BrazilianStates[9, 1], BrazilianStates[9,0]),
                };
                return ArrayBrazilianStates;

            }
        }
    }

Answer 1

我建议您执行以下操作：

(string code, string name, double area)[] BrazilianStates =
{
    ("AC", "Acre", 164123.040),
    // etc
};

(string code, string name, double area)[] top10 =
    BrazilianStates
        .OrderByDescending(x => x.area)
        .Take(10)
        .ToArray();

请注意，我将二维数组更改为一维强类型元组数组。

数组未返回期望值

1 个答案: