docs/fundamentals/runtime-libraries/snippets/System/Random/Overview/csharp/long1.cs - main - aprogrammer/dotnet-docs

docs/fundamentals/runtime-libraries/snippets/System/Random/Overview/csharp/long1.cs

43 строки2 KB

Genevieve Warren

Add remarks for core types (#38970)

05 янв 2024, 22:14

05 янв 2024, 22:1471d1377

using System;

public class Example14
{
    public static void Main()
    {
        // <Snippet14>
        const long ONE_TENTH = 922337203685477581;

        Random rnd = new Random();
        long number;
        int[] count = new int[10];

        // Generate 20 million long integers.
        for (int ctr = 1; ctr <= 20000000; ctr++)
        {
            number = (long)(rnd.NextDouble() * Int64.MaxValue);
            // Categorize random numbers.
            count[(int)(number / ONE_TENTH)]++;
        }
        // Display breakdown by range.
        Console.WriteLine("{0,28} {1,32}   {2,7}\n", "Range", "Count", "Pct.");
        for (int ctr = 0; ctr <= 9; ctr++)
            Console.WriteLine("{0,25:N0}-{1,25:N0}  {2,8:N0}   {3,7:P2}", ctr * ONE_TENTH,
                               ctr < 9 ? ctr * ONE_TENTH + ONE_TENTH - 1 : Int64.MaxValue,
                               count[ctr], count[ctr] / 20000000.0);

        // The example displays output like the following:
        //                           Range                            Count      Pct.
        //
        //                            0-  922,337,203,685,477,580  1,996,148    9.98 %
        //      922,337,203,685,477,581-1,844,674,407,370,955,161  2,000,293   10.00 %
        //    1,844,674,407,370,955,162-2,767,011,611,056,432,742  2,000,094   10.00 %
        //    2,767,011,611,056,432,743-3,689,348,814,741,910,323  2,000,159   10.00 %
        //    3,689,348,814,741,910,324-4,611,686,018,427,387,904  1,999,552   10.00 %
        //    4,611,686,018,427,387,905-5,534,023,222,112,865,485  1,998,248    9.99 %
        //    5,534,023,222,112,865,486-6,456,360,425,798,343,066  2,000,696   10.00 %
        //    6,456,360,425,798,343,067-7,378,697,629,483,820,647  2,001,637   10.01 %
        //    7,378,697,629,483,820,648-8,301,034,833,169,298,228  2,002,870   10.01 %
        //    8,301,034,833,169,298,229-9,223,372,036,854,775,807  2,000,303   10.00 %
        // </Snippet14>
    }
}