using System;
namespace array
{
class Program
{
static void Main(string[] args)
{
int[] arr = new int[] { 4, 5, 6, 2, 1, 3, 9, 8, 7 };
int max = arr[0];
int min = arr[0];
int a=0, b=0,c,d;
for (int i = 0; i <arr.Length; i++)
{
if (max<arr[i])
{
max = arr[i];
a=i;
}
if (min>arr[i])
{
min = arr[i];
b=i;
}
}
c = arr[0];
arr[0] = max;
arr[a] = c;
d = arr[arr.Length - 1];
arr[arr.Length - 1] = min;
arr[b] = d;
foreach (var item in arr)
{
Console.WriteLine(item);
}
Console.ReadKey();
}
}
}
初学者,有错误欢迎指正