C# 如何使这段代码更紧凑 (If,else if,else)

Question

我是一年级学生，我们被要求做作业，我想知道有没有其他方法可以检查用户输入，这样我就不必在每次输入后做所有的 if 和 else，或者有什么方法可以循环它并保存 6 个不同的答案或类似的东西.....

    static void Main(string[] args)
    {
        //var
        string s0, s1, s2, s3, s4, s5; //subejects
        string g0, g1, g2, g3, g4, g5;//grades

        //input grades/subject
        Console.Write("Enter Subject 1  : ");
        s0 = Console.ReadLine();
        Console.Write("Enter Grade 1  : ");
        g0 = Console.ReadLine();
        g0 = g0.ToUpperInvariant();
        if (g0 == "H1")
            g0 = "100";
        else if (g0 == "H2")
            g0 = "88";
        else if (g0 == "H3")
            g0 = "77";
        else if (g0 == "H4")
            g0 = "66";
        else if (g0 == "H5" || g0 == "O1")
            g0 = "56";
        else if (g0 == "H6" || g0 == "O2")
            g0 = "46";
        else if (g0 == "H7" || g0 == "O3")
            g0 = "37";
        else if (g0 == "H8")
            g0 = "0";
        else if (g0 == "O4")
            g0 = "28";
        else if (g0 == "O5")
            g0 = "20";
        else if (g0 == "O6")
            g0 = "12";
        else if (g0 == "O7" || g0 == "O8")
            g0 = "0";
        else
            Console.WriteLine("Wrong Grade Format!");

        Console.Write("\nEnter Subject 2 : ");
        s1 = Console.ReadLine();
        Console.Write("Enter Grade 2  : ");
        g1 = Console.ReadLine();
        g1 = g1.ToUpperInvariant();

        Console.Write("\nEnter Subject 3 : ");
        s2 = Console.ReadLine();
        Console.Write("Enter Grade 3  : ");
        g2 = Console.ReadLine();
        g2 = g2.ToUpperInvariant();

        Console.Write("\nEnter Subject 4 : ");
        s3 = Console.ReadLine();
        Console.Write("Enter Grade 4  : ");
        g3 = Console.ReadLine();
        g3 = g3.ToUpperInvariant();

        Console.Write("\nEnter Subject 5 : ");
        s4 = Console.ReadLine();
        Console.Write("Enter Grade 5  : ");
        g4 = Console.ReadLine();
        g4 = g4.ToUpperInvariant();

        Console.Write("\nEnter Subject 6 : ");
        s5 = Console.ReadLine();
        Console.Write("Enter Grade 6  : ");
        g5 = Console.ReadLine();
        g5 = g5.ToUpperInvariant();

        Console.Clear();

        //collect information into array
        for (int i = 0; i <= 5; i++)
        {
            string[] subjects = { s0, s1, s2, s3, s4, s5 };
            string[] grades = { g0, g1, g2, g3, g4, g5 };

            Console.WriteLine("{0,15}:{1,-15}", subjects[i],grades[i]);//output
        }
    }
}

如果我问的是愚蠢简单的问题，请不要生气，但我在网络上所能找到的只是更高级的方法....谢谢。

Answer 1

我建议像这样初始化一个字典来进行查找:

var lookup = new Dictionary<string, string>
{
    ["H1"] = "100",
    ["H2"] = "88",
    ["H3"] = "77"
    // Etc.
};

然后查找字符串如下:

g0 = g0.ToUpperInvariant();

if (!lookup.TryGetValue(g0, out g0))
    Console.WriteLine("Wrong Grade Format!");