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C# Int32.CompareTo用法及代码示例


Int32.CompareTo方法用于将当前实例与指定的对象或Int32进行比较，并返回其相对值的符号。此方法的重载列表中有2种方法，如下所示：

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

Int32.CompareTo(Int32)方法

此方法用于将当前实例与指定的32位带符号整数进行比较，并返回其相对值的符号。


用法:

public int CompareTo (int value);

在这里，需要整数进行比较。

返回值：它返回一个32位带符号的数字，指示当前实例和value参数的相对值，如下所示：

  • 小于零：如果当前实例
  • 零：如果当前实例=值
  • 大于零：如果当前实例>值

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 
// 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); 
    } 
}
输出： 
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); 
    } 
}
输出： 
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

此方法用于将当前实例与指定对象进行比较，并返回其相对值的符号。

用法: 


public int CompareTo (object value);

在这里，它需要一个对象进行比较，或者为null。

返回值：它返回一个32位带符号的数字，指示当前实例和value参数的相对值，如下所示：

  • 小于零：如果当前实例
  • 零：如果当前实例=值
  • 大于零：如果Current Instance> value或value为null。

异常：如果value不是Int32，则抛出ArgumentException。

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 
// 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); 
        } 
    } 
}
输出： 
10 is less than 562587

示例2:对于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); 
        } 
    } 
}
输出： 
value2 must be Int32
Exception Thrown: System.ArgumentException

参考：



相关用法


注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 Int32.CompareTo 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。