本文整理匯總了C#中System.Random.NextDouble方法的典型用法代碼示例。如果您正苦於以下問題：C# Random.NextDouble方法的具體用法？C# Random.NextDouble怎麽用？C# Random.NextDouble使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Random的用法示例。
在下文中一共展示了Random.NextDouble方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: RunIntNDoubleRandoms
// Example of the Random class constructors and Random.NextDouble( )
// method.
using System;
using System.Threading;
public class RandomObjectDemo
{
// Generate random numbers from the specified Random object.
static void RunIntNDoubleRandoms( Random randObj )
{
// Generate the first six random integers.
for( int j = 0; j < 6; j++ )
Console.Write( " {0,10} ", randObj.Next( ) );
Console.WriteLine( );
// Generate the first six random doubles.
for( int j = 0; j < 6; j++ )
Console.Write( " {0:F8} ", randObj.NextDouble( ) );
Console.WriteLine( );
}
// Create a Random object with the specified seed.
static void FixedSeedRandoms( int seed )
{
Console.WriteLine(
"\nRandom numbers from a Random object with " +
"seed = {0}:", seed );
Random fixRand = new Random( seed );
RunIntNDoubleRandoms( fixRand );
}
// Create a random object with a timer-generated seed.
static void AutoSeedRandoms( )
{
// Wait to allow the timer to advance.
Thread.Sleep( 1 );
Console.WriteLine(
"\nRandom numbers from a Random object " +
"with an auto-generated seed:" );
Random autoRand = new Random( );
RunIntNDoubleRandoms( autoRand );
}
static void Main( )
{
Console.WriteLine(
"This example of the Random class constructors and " +
"Random.NextDouble( ) \n" +
"generates the following output.\n" );
Console.WriteLine(
"Create Random objects, and then generate and " +
"display six integers and \nsix doubles from each.");
FixedSeedRandoms( 123 );
FixedSeedRandoms( 123 );
FixedSeedRandoms( 456 );
FixedSeedRandoms( 456 );
AutoSeedRandoms( );
AutoSeedRandoms( );
AutoSeedRandoms( );
}
}輸出：
Create Random objects, and then generate and display six integers and six doubles from each. Random numbers from a Random object with seed = 123: 2114319875 1949518561 1596751841 1742987178 1586516133 103755708 0.01700087 0.14935942 0.19470390 0.63008947 0.90976122 0.49519146 Random numbers from a Random object with seed = 123: 2114319875 1949518561 1596751841 1742987178 1586516133 103755708 0.01700087 0.14935942 0.19470390 0.63008947 0.90976122 0.49519146 Random numbers from a Random object with seed = 456: 2044805024 1323311594 1087799997 1907260840 179380355 120870348 0.21988117 0.21026556 0.39236514 0.42420498 0.24102703 0.47310170 Random numbers from a Random object with seed = 456: 2044805024 1323311594 1087799997 1907260840 179380355 120870348 0.21988117 0.21026556 0.39236514 0.42420498 0.24102703 0.47310170 Random numbers from a Random object with an auto-generated seed: 380213349 127379247 1969091178 1983029819 1963098450 1648433124 0.08824121 0.41249688 0.36445811 0.05637512 0.62702451 0.49595560 Random numbers from a Random object with an auto-generated seed: 861793304 2133528783 1947358439 124230908 921262645 1087892791 0.56880819 0.42934091 0.60162512 0.74388610 0.99432979 0.30310005 Random numbers from a Random object with an auto-generated seed: 1343373259 1992194672 1925625700 412915644 2026910487 527352458 0.04937517 0.44618494 0.83879212 0.43139707 0.36163507 0.11024451
示例2: Random
int[] frequency = new int[10];
double number;
Random rnd = new Random();
for (int ctr = 0; ctr <= 99; ctr++) {
number = rnd.NextDouble();
frequency[(int) Math.Floor(number*10)] ++;
}
Console.WriteLine("Distribution of Random Numbers:");
for (int ctr = frequency.GetLowerBound(0); ctr <= frequency.GetUpperBound(0); ctr++)
Console.WriteLine("0.{0}0-0.{0}9 {1}", ctr, frequency[ctr]);
// The following example displays output similar to the following:
// Distribution of Random Numbers:
// 0.00-0.09 16
// 0.10-0.19 8
// 0.20-0.29 8
// 0.30-0.39 11
// 0.40-0.49 9
// 0.50-0.59 6
// 0.60-0.69 13
// 0.70-0.79 6
// 0.80-0.89 9
// 0.90-0.99 14示例3: Random.NextDouble()
//引入命名空間
using System;
using System.Windows.Forms;
using System.Drawing;
public class Test {
static void Main() {
Random roller = new Random();
double toHit = roller.NextDouble();
Console.WriteLine(toHit);
}
}