-1

ユーザーが1を入力した場合（次のコードがユーザーに2つの入力を要求することを示すコメントの直後）、ユーザーが-1を入力した場合は、46行目からプログラムを再起動するのを手伝ってくれる人がいます。やり方が思いつきません。私はC#が初めてなので、あなたが与えることができるどんな助けも素晴らしいでしょう!

class Program
{
    static void Main(string[] args)
    {

        //Displays data in correct Format

        List<float> inputList = new List<float>();
        TextReader tr = new StreamReader("c:/users/tom/documents/visual studio 2010/Projects/DistanceCalculator3/DistanceCalculator3/TextFile1.txt");
        String input = Convert.ToString(tr.ReadToEnd());
        String[] items = input.Split(',');
        Console.WriteLine("Point         Latitude        Longtitude       Elevation");

        for (int i = 0; i < items.Length; i++)
        {
            if (i % 3 == 0)
            {
                Console.Write((i / 3) + "\t\t");
            }

            Console.Write(items[i]);
            Console.Write("\t\t");

            if (((i - 2) % 3) == 0)
            {
                Console.WriteLine();
            }

        }

        Console.WriteLine();
        Console.WriteLine();


        // Ask for two inputs from the user which is then converted into 6 floats and transfered in class Coordinates    


        Console.WriteLine("Please enter the two points that you wish to know the distance between:");
        string point = Console.ReadLine();
        string[] pointInput = point.Split(' ');

        int pointNumber = Convert.ToInt16(pointInput[0]);
        int pointNumber2 = Convert.ToInt16(pointInput[1]);

        Coordinates distance = new Coordinates();

        distance.latitude = (Convert.ToDouble(items[pointNumber * 3]));
        distance.longtitude = (Convert.ToDouble(items[(pointNumber * 3) + 1]));
        distance.elevation = (Convert.ToDouble(items[(pointNumber * 3) + 2]));

        distance.latitude2 = (Convert.ToDouble(items[pointNumber2 * 3]));
        distance.longtitude2 = (Convert.ToDouble(items[(pointNumber2 * 3) + 1]));
        distance.elevation2 = (Convert.ToDouble(items[(pointNumber2 * 3) + 2]));


        //Calculate the distance between two points

        const double PIx = 3.141592653589793;
        const double RADIO = 6371;

        double dlat = ((distance.latitude2) * (PIx / 180)) - ((distance.latitude) * (PIx / 180));
        double dlon = ((distance.longtitude2) * (PIx / 180)) - ((distance.longtitude) * (PIx / 180));

        double a = (Math.Sin(dlat / 2) * Math.Sin(dlat / 2)) + Math.Cos((distance.latitude) * (PIx / 180)) * Math.Cos((distance.latitude2) * (PIx / 180)) * (Math.Sin(dlon / 2) * Math.Sin(dlon / 2));
        double angle = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
        double ultimateDistance = (angle * RADIO);

        Console.WriteLine("The distance between your two points is...");
        Console.WriteLine(ultimateDistance);

        //Repeat the program if the user enters 1, end the program if the user enters -1

        Console.WriteLine("If you wish to calculate another distance type 1 and return, if you wish to end the program, type -1.");
        Console.ReadLine();

        if (Convert.ToInt16(Console.ReadLine()) == 1);

        {
           //here is where I need it to repeat
        }
4

5 に答える 5

1 
bool exit = false;
do
{
    Console.WriteLine("Please enter the two points that you wish to know the distance between:");
    ...
    Console.WriteLine("If you wish to calculate another distance type 1 and return, if you wish to end the program, type -1.");

    string input;

    do
    {
        input = Console.ReadLine().Trim();
    }
    while (input != "1" && input != "-1");

    if (input == -1) exit = true;
}
while (!exit);

しかし、ロジックをメソッドや関数に押し込んで、プログラムがはるかに小さなビルディング ブロックで構築されるようにすることを考えた方がはるかによいでしょう。

次のようなものを目指す必要があります。

bool exit = false;
do
{
    Point[] points = ReadCoordinates();
    Whatever result = CalculateWhatever();
    DisplayResults(results);

    exit = ShouldExit();
}
while (!exit);

これにより、プログラムの外側のループが自己文書化され、メソッドが自明になります。

于 2012-10-25T10:43:50.413 に答える
0

それはかなり奇妙なことです。whileループを調べましたか？

上記の構造のメソッドを作成してループし、userinput が -1 の場合は 1 に等しい場合は、次のステートメントを呼び出します。

Application.Exit()
于 2012-10-25T10:43:47.850 に答える
0

Goto を使用して、ユーザー入力でプログラムをループさせることができます。

    public static void Main(string[] args)
    {
        RestartApplication:

        //// Displays data in correct Format
        TextReader textReader = new StreamReader("c:/users/tom/documents/visual studio 2010/Projects/DistanceCalculator3/DistanceCalculator3/TextFile1.txt");
        var input = Convert.ToString(textReader.ReadToEnd());
        var items = input.Split(',');
        Console.WriteLine("Point         Latitude        Longtitude       Elevation");

        for (var i = 0; i < items.Length; i++)
        {
            if (i % 3 == 0)
            {
                Console.Write((i / 3) + "\t\t");
            }

            Console.Write(items[i]);
            Console.Write("\t\t");
            if (((i - 2) % 3) == 0)
            {
                Console.WriteLine();
            }
        }

        Console.WriteLine();
        Console.WriteLine();

        //// Ask for two inputs from the user which is then converted into 6 floats and transferred in class Coordinates    
        Console.WriteLine("Please enter the two points that you wish to know the distance between:");
        var point = Console.ReadLine();
        string[] pointInput;
        if (point != null)
        {
            pointInput = point.Split(' ');
        }
        else
        {
            goto RestartApplication;
        }

        var pointNumber = Convert.ToInt16(pointInput[0]);
        var pointNumber2 = Convert.ToInt16(pointInput[1]);

        var distance = new Coordinates
            {
                Latitude = Convert.ToDouble(items[pointNumber * 3]),
                Longtitude = Convert.ToDouble(items[(pointNumber * 3) + 1]),
                Elevation = Convert.ToDouble(items[(pointNumber * 3) + 2]),
                Latitude2 = Convert.ToDouble(items[pointNumber2 * 3]),
                Longtitude2 = Convert.ToDouble(items[(pointNumber2 * 3) + 1]),
                Elevation2 = Convert.ToDouble(items[(pointNumber2 * 3) + 2])
            };

        //// Calculate the distance between two points
        const double PIx = 3.141592653589793;
        const double Radio = 6371;

        var dlat = (distance.Latitude2 * (PIx / 180)) - (distance.Latitude * (PIx / 180));
        var dlon = (distance.Longtitude2 * (PIx / 180)) - (distance.Longtitude * (PIx / 180));

        var a = (Math.Sin(dlat / 2) * Math.Sin(dlat / 2)) + Math.Cos(distance.Latitude * (PIx / 180)) * Math.Cos(distance.Latitude2 * (PIx / 180)) * (Math.Sin(dlon / 2) * Math.Sin(dlon / 2));
        var angle = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
        var ultimateDistance = angle * Radio;
        Console.WriteLine("The distance between your two points is...");
        Console.WriteLine(ultimateDistance);

        //// Repeat the program if the user enters 1, end the program if the user enters -1
        Console.WriteLine("If you wish to calculate another distance type 1 and return, if you wish to end the program, type -1.");
        var userInput = Console.ReadLine();
        if (Convert.ToInt16(userInput) == 1)
        {
            //// Here is where the application will repeat.
            goto RestartApplication;
        }
    }

また、コードのフォーマットも少し行いました。それが役に立てば幸い。

于 2012-10-25T10:52:17.643 に答える
0

goto でそれを行うことができますが、これは悪い習慣と見なされることに注意してください。 

static void Main(string[] args)
{
...
MyLabel:
...
if (Convert.ToInt16(Console.ReadLine()) == 1);
{
    //here is where I need it to repeat
    goto MyLabel;
}
于 2012-10-25T10:57:38.633 に答える
0 
if (Convert.ToInt16(Console.ReadLine()) == 1);
{
    Main(args)
}
于 2012-10-25T10:42:14.603 に答える