翻倍。C# 中的 Equals()方法及示例
原文:https://www . geesforgeks . org/double-equals-method-in-c-sharp-with-examples/
翻倍。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。该方法的重载列表中总共有两种方法，如下所示:
- 等于(双倍)法
- 等于(对象)法
双倍。等于(双倍)
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。
语法:public bool Equals(double obj)； 在这里，需要一个 Double 对象来与这个实例进行比较。 返回值:如果 obj 等于这个实例，这个方法返回 true 否则，为假。
以下程序说明了 Double 的使用。Equals() 方法:
例 1:
C
// 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);
}
}
Output:
10 is not equal to 20
例 2:
C
// 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);
// 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);
}
}
Output:
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
双倍。等于(对象)方法
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。
语法:公共覆盖 bool Equals(对象 obj)； 在这里，需要一个对象来与这个实例进行比较。 返回值:如果 obj 是 Double 的实例，并且等于该实例的值，则该方法返回 true 否则，为假。
以下程序说明了上述方法的使用:
例 1:
C
// 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);
}
}
Output:
10 is not equal to 0
例 2:
C
// 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);
}
}
Output:
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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