编辑代码

using System;  
  
class Program  
{  
    static void Main()  
    {  
        int[] array = { 1, -2, 0, 3, -4 };  
  
        for (int i = 0; i < array.Length; i++)  
        {  
            if (array[i] > 0)  
            {  
                array[i]++;  
            }  
            else if (array[i] < 0)  
            {  
                array[i]--;  
            }  
        }  
  
        Console.WriteLine("处理后的数组:");  
        foreach (int num in array)  
        {  
            Console.Write(num + " ");  
        }  
    }  
}