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C# Int32.CompareTo用法及代碼示例


Int32.CompareTo方法用於將當前實例與指定的對象或Int32進行比較，並返回其相對值的符號。此方法的重載列表中有2種方法，如下所示：

    • CompareTo(Int32)方法
    • CompareTo(Object)方法

Int32.CompareTo(Int32)方法

此方法用於將當前實例與指定的32位帶符號整數進行比較，並返回其相對值的符號。


用法:

public int CompareTo (int value);

在這裏，需要整數進行比較。

返回值：它返回一個32位帶符號的數字，指示當前實例和value參數的相對值，如下所示：

  • 小於零：如果當前實例
  • 零：如果當前實例=值
  • 大於零：如果當前實例>值

以下示例程序旨在說明上述方法的用法：

示例1: 

// C# program to demonstrate the 
// Int32.CompareTo(Int32) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // Declaring and initializing value1 
        int value1 = 10; 
  
        // Declaring and initializing value2 
        int value2 = 20; 
  
        // 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); 
    } 
}
輸出： 
10 is less than 20

示例2: 

// C# program to demonstrate the 
// Int32.CompareTo(Int32) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        // calling get() method 
        get(5, 7); 
        get(3025, 3025); 
        get(10, 20); 
        get(7, -12); 
    } 
  
    // defining get() method 
    public static void get(int value1, 
                           int value2) 
    { 
  
        // using the 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); 
    } 
}
輸出： 
5 is less than 7
3025 is equal to 3025
10 is less than 20
7 is greater than -12

Int32.CompareTo(Object)方法

此方法用於將當前實例與指定對象進行比較，並返回其相對值的符號。

用法: 


public int CompareTo (object value);

在這裏，它需要一個對象進行比較，或者為null。

返回值：它返回一個32位帶符號的數字，指示當前實例和value參數的相對值，如下所示：

  • 小於零：如果當前實例
  • 零：如果當前實例=值
  • 大於零：如果Current Instance> value或value為null。

異常：如果value不是Int32，則拋出ArgumentException。

以下示例程序旨在說明上述方法的用法：

示例1:

// C# program to demonstrate the 
// Int32.CompareTo(Object) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        try { 
  
            // Declaring and initializing value1 
            int value1 = 10; 
  
            // Declaring and initializing value2 
            object value2 = 562587; 
  
            // 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 Int32"); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}
輸出： 
10 is less than 562587

示例2:對於ArgumentException

// C# program to demonstrate the 
// Int32.CompareTo(object) Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        try { 
  
            // Declaring and initializing value1 
            int value1 = 10; 
  
            // Declaring and initializing value2 
            object value2 = 9856745963; 
  
            // 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 Int32"); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}
輸出： 
value2 must be Int32
Exception Thrown: System.ArgumentException

參考：



相關用法


注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Int32.CompareTo Method in C# with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。