数组和循环

数组和循环

int[] a = new int[10];//创建一个数组 元素10个
a[0] = 1;
a[1] = 1;
int i = 0;
for (i = 2; i < 10; i++)//for循环,先循环后判断
{
    a[i] = a[i - 1] + a[i - 2];
}
i = 0;
while (i < 10)//while循环,先判断后循环
{
    Console.WriteLine(a[i++]);
}
foreach (int x in a)//自动索引
{
    Console.WriteLine(x);
}

查找数组中最大的数

int N = 10;
var r = new Random();
int[] a = new int[N];//创建一个数组 元素10个
Console.Write("当前数据:");
for (int i = 0; i < N; i++)
{
    Console.Write((a[i] = r.Next(0, 20))+" ");
}
Console.WriteLine("");

int max = a[0];
foreach (int x in a)
{
    max = max > x ? max : x;
}
Console.WriteLine("最大值:{0}", max);

数组数据排序

int N = 10;
var r = new Random();
int[] a = new int[N];//创建一个数组 元素10个
Console.Write("当前数据:");
for (int i = 0; i < N; i++)
{
    Console.Write((a[i] = r.Next(0, 20)) + " ");
}
Console.WriteLine("");//输出所有数据
int temp;
for (int i = 0; i < N; i++)
{
    for (int y = i+1; y < N; y++)
    {
        if (a[i] < a[y])
        {
            temp = a[y];
            a[y] = a[i];
            a[i] = temp;
        }
    }
}
Console.Write("排序数据:");
foreach (int x in a)
{
    Console.Write(x+" ");
}

预处理指令

#region 可以缩小代码吧中间的代码框起来
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#endregion