本文整理匯總了C#中System.Double.Equals方法的典型用法代碼示例。如果您正苦於以下問題：C# Double.Equals方法的具體用法？C# Double.Equals怎麽用？C# Double.Equals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.Double的用法示例。
在下文中一共展示了Double.Equals方法的5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:
// Initialize two doubles with apparently identical values
double double1 = .333333;
double double2 = (double) 1/3;
// Define the tolerance for variation in their values
double difference = Math.Abs(double1 * .00001);
// Compare the values
// The output to the console indicates that the two values are equal
if (Math.Abs(double1 - double2) <= difference)
Console.WriteLine("double1 and double2 are equal.");
else
Console.WriteLine("double1 and double2 are unequal.");示例2:
// Initialize two doubles with apparently identical values
double double1 = .33333;
double double2 = 1/3;
// Compare them for equality
Console.WriteLine(double1.Equals(double2)); // displays false示例3: Main
//引入命名空間
using System;
public class Example
{
public static void Main()
{
double value1 = .1 * 10;
double value2 = 0;
for (int ctr = 0; ctr < 10; ctr++)
value2 += .1;
Console.WriteLine("{0:R} = {1:R}: {2}", value1, value2,
HasMinimalDifference(value1, value2, 1));
}
public static bool HasMinimalDifference(double value1, double value2, int units)
{
long lValue1 = BitConverter.DoubleToInt64Bits(value1);
long lValue2 = BitConverter.DoubleToInt64Bits(value2);
// If the signs are different, return false except for +0 and -0.
if ((lValue1 >> 63) != (lValue2 >> 63))
{
if (value1 == value2)
return true;
return false;
}
long diff = Math.Abs(lValue1 - lValue2);
if (diff <= (long) units)
return true;
return false;
}
}輸出：
01 = 0.99999999999999989: True
示例4: Main
//引入命名空間
using System;
public class Example
{
static double value = 112;
public static void Main()
{
byte byte1= 112;
Console.WriteLine("value = byte1: {0,16}", value.Equals(byte1));
TestObjectForEquality(byte1);
short short1 = 112;
Console.WriteLine("value = short1: {0,16}", value.Equals(short1));
TestObjectForEquality(short1);
int int1 = 112;
Console.WriteLine("value = int1: {0,18}", value.Equals(int1));
TestObjectForEquality(int1);
long long1 = 112;
Console.WriteLine("value = long1: {0,17}", value.Equals(long1));
TestObjectForEquality(long1);
sbyte sbyte1 = 112;
Console.WriteLine("value = sbyte1: {0,16}", value.Equals(sbyte1));
TestObjectForEquality(sbyte1);
ushort ushort1 = 112;
Console.WriteLine("value = ushort1: {0,16}", value.Equals(ushort1));
TestObjectForEquality(ushort1);
uint uint1 = 112;
Console.WriteLine("value = uint1: {0,18}", value.Equals(uint1));
TestObjectForEquality(uint1);
ulong ulong1 = 112;
Console.WriteLine("value = ulong1: {0,17}", value.Equals(ulong1));
TestObjectForEquality(ulong1);
decimal dec1 = 112m;
Console.WriteLine("value = dec1: {0,21}", value.Equals(dec1));
TestObjectForEquality(dec1);
float sng1 = 112;
Console.WriteLine("value = sng1: {0,19}", value.Equals(sng1));
TestObjectForEquality(sng1);
}
private static void TestObjectForEquality(Object obj)
{
Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
value, value.GetType().Name,
obj, obj.GetType().Name,
value.Equals(obj));
}
}輸出：
value = byte1: True 112 (Double) = 112 (Byte): False value = short1: True 112 (Double) = 112 (Int16): False value = int1: True 112 (Double) = 112 (Int32): False value = long1: True 112 (Double) = 112 (Int64): False value = sbyte1: True 112 (Double) = 112 (SByte): False value = ushort1: True 112 (Double) = 112 (UInt16): False value = uint1: True 112 (Double) = 112 (UInt32): False value = ulong1: True 112 (Double) = 112 (UInt64): False value = dec1: False 112 (Double) = 112 (Decimal): False value = sng1: True 112 (Double) = 112 (Single): False
示例5:
// Initialize two doubles with apparently identical values
double double1 = .33333;
object double2 = 1/3;
// Compare them for equality
Console.WriteLine(double1.Equals(double2)); // displays false