单身。将 C# 中的()方法与示例进行比较
原文:https://www . geeksforgeeks . org/single-compare to-method-in-c-sharp-with-examples/
单身。CompareTo()方法用于将当前实例与指定对象或另一个 Single 实例进行比较，并返回一个整数，该整数显示当前实例的值是大于、等于还是小于指定对象或另一个 Single 实例的值。此方法的重载列表中有 2 种方法，如下所示:
-
比较(单一)方法 *CompareTo(Object) Method
单身。比较(单一)方法
此方法用于将当前实例与指定的单精度浮点数进行比较，并返回一个整数，该整数指示此实例的值是小于、等于还是大于指定的单精度浮点数的值。
语法:
cs public int CompareTo (float value);这里，需要一个单精度浮点数进行比较。
返回值:返回一个 32 位有符号数，表示当前实例和值参数的相对值，如下所示:
- 小于零:如果当前实例<值或当前实例不是数字( NaN )且值是数字。
- 零:如果当前实例=值或当前实例和值都不是数字( NaN )、 PositiveInfinity 或 NegativeInfinity 。
- 大于零:如果当前实例>值或当前实例是一个数字并且值不是一个数字( NaN )。
以下程序说明了 Single 的使用。比较(单一)方法:
例 1:
```cs // C# program to demonstrate the // Single.CompareTo(Single) Method using System;
class GFG {
// Main Method public static void Main() {
// Declaring and initializing value1 float value1 = 10.5f;
// Declaring and initializing value2 float value2 = 20.6f;
// compare both the values // using CompareTo() method int status = value1.CompareTo(value2);
// checking the status if (status > 0) Console.WriteLine("{0} is greater than {1}", value1, value2); else if (status < 0) Console.WriteLine("{0} is less than {1}", value1, value2); else Console.WriteLine("{0} is equal to {1}", value1, value2); } } ```
Output:
```cs 10.5 is less than 20.6
```
例 2:
```cs // C# program to demonstrate the // Single.CompareTo(Single) Method using System;
class GFG {
// Main Method public static void Main() { // calling get() method get(5.4f, 7.5f); get(30.4f, 20.3f); get(10.4f, 10.4f); get(7.2f, -12.3f); }
// defining get() method public static void get(float value1, float value2) {
// using CompareTo() method int status = value1.CompareTo(value2);
// checking the status if (status > 0) Console.WriteLine("{0} is greater than {1}", value1, value2); else if (status < 0) Console.WriteLine("{0} is less than {1}", value1, value2); else Console.WriteLine("{0} is equal to {1}", value1, value2); } } ```
Output:
```cs 5.4 is less than 7.5 30.4 is greater than 20.3 10.4 is equal to 10.4 7.2 is greater than -12.3
```
单身。比较对象方法
此方法用于将当前实例与指定对象进行比较，并返回一个整数，该整数显示当前实例的值是小于、等于还是大于指定对象的值。
语法:
cs public int CompareTo (object value);这里，它将对象与这个实例进行比较，或者为 null。
返回值:返回一个 32 位有符号数，表示当前实例和值参数的相对值，如下所示:
- 小于零:如果当前实例<值或当前实例不是数字( NaN )且值是数字。
- 零:如果当前实例=值或当前实例和值都不是数字( NaN )、 PositiveInfinity 或 NegativeInfinity 。
- 大于零:如果当前实例>值或当前实例是一个数字并且值不是一个数字( NaN )。
异常:如果值不是单，则抛出参数异常。
以下程序说明了 Single 的使用。比较(对象)方法
例 1:
```cs // C# program to demonstrate the // Single.CompareTo(Object) Method using System;
class GFG {
// Main Method public static void Main() { try {
// Declaring and initializing value1 float value1 = 10.4f;
// Declaring and initializing value2 object value2 = 10.5f;
// compare both the value // using CompareTo() method int status = value1.CompareTo(value2);
// checking the status if (status > 0) Console.WriteLine("{0} is greater than {1}", value1, value2);
else if (status < 0) Console.WriteLine("{0} is less than {1}", value1, value2); else Console.WriteLine("{0} is equal to {1}", value1, value2); }
catch (ArgumentException e) { Console.WriteLine("value2 must be Single"); Console.Write("Exception Thrown: "); Console.Write("{0}", e.GetType(), e.Message); } } } ```
Output:
```cs 10.4 is less than 10.5
```
示例 2: 适用于参数异常
```cs // C# program to demonstrate the // Single.CompareTo(object) Method using System; using System.Globalization;
class GFG {
// Main Method public static void Main() { try {
// Declaring and initializing value1 float value1 = 10;
// Declaring and initializing value2 object value2 = 1 / 3;
// using CompareTo() method int status = value1.CompareTo(value2);
// checking the status if (status > 0) Console.WriteLine("{0} is greater than {1}", value1, value2);
else if (status < 0) Console.WriteLine("{0} is less than {1}", value1, value2); else Console.WriteLine("{0} is equal to {1}", value1, value2); }
catch (ArgumentException e) { Console.WriteLine("value2 must be Single"); Console.Write("Exception Thrown: "); Console.Write("{0}", e.GetType(), e.Message); } } } ```
Output:
```cs value2 must be Single Exception Thrown: System.ArgumentException
```
参考:
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