Double.Equals()方法用于获取一个值,该值指示Double的两个实例是否表示相同的值。此方法的重载列表中共有两种方法,如下所示:
- 等于(双精度)方法
- 等于(对象)方法
Double.Equals(Double)
此方法用于返回一个值,该值指示此实例和指定的Double对象是否表示相同的值。
用法: public bool Equals (double obj);
Here, it takes a Double object to compare to this instance.
返回值:如果obj等于此实例,则此方法返回true;否则,返回true。否则为假。
下面的程序说明Double.Equals()方法的使用:
示例1:
// C# program to demonstrate the
// Double.Equals(Double)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing value1
double value1 = 10d;
// Declaring and initializing value2
double value2 = 20d;
// compare both double value
// using Equals(Double) method
bool status = value1.Equals(value2);
// checking the status
if (status)
Console.WriteLine("{0} is equal to {1}",
value1, value2);
else
Console.WriteLine("{0} is not equal to {1}",
value1, value2);
}
}
输出:
10 is not equal to 20
示例2:
// C# program to demonstrate the
// Double.Equals(Double)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// calling get() method
get(5d, 5d);
get(5.5d, 4.5d);
get(10d, 20d);
get(7.5d, 19.5d);
}
// defining get() method
public static void get(double value1, double value2)
{
// compare both double value
// using Equals(Double) method
bool status = value1.Equals(value2);
// cheking the status
if (status)
Console.WriteLine("{0} is equal to {1}",
value1, value2);
else
Console.WriteLine("{0} is not equal to {1}",
value1, value2);
}
}
输出:
5 is equal to 5 5.5 is not equal to 4.5 10 is not equal to 20 7.5 is not equal to 19.5
Double.Equals(Object) Method
此方法用于返回一个值,该值指示此实例是否等于指定的对象。
用法: public override bool Equals (object obj);
Here, it takes an object to compare with this instance.
返回值:如果obj是Double的一个实例,并且等于该实例的值,则此方法返回true;否则,此方法返回true。否则为假。
以下示例程序旨在说明上述方法的用法:
示例1:
// C# program to demonstrate the
// Double.Equals(Object)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing value1
double value1 = 10d;
// Declaring and initializing value2
object value2 = 1 / 36;
// compare both double value
// using Equals(object) method
bool status = value1.Equals(value2);
// checking the status
if (status)
Console.WriteLine("{0} is equal to {1}",
value1, value2);
else
Console.WriteLine("{0} is not equal to {1}",
value1, value2);
}
}
输出:
10 is not equal to 0
示例2:
// C# program to demonstrate the
// Double.Equals(object)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// calling get() method
get(5d, 1 / 3);
get(5.5d, 1 / 3);
get(10d, 1 / 24);
get(7.5d, 2 / 5);
}
// defining get() method
public static void get(double value1, object value2)
{
// compare both double value
// using Equals(object) method
bool status = value1.Equals(value2);
// checking the status
if (status)
Console.WriteLine("{0} is equal to {1}",
value1, value2);
else
Console.WriteLine("{0} is not equal to {1}",
value1, value2);
}
}
输出:
5 is not equal to 0 5.5 is not equal to 0 10 is not equal to 0 7.5 is not equal to 0
参考:
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注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Double.Equals() Method in C# with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。