案例作业(一)

第三章       循环结构课后（一）

 

 

 

作业一：显示12生肖页面效果图

 

 

后台代码如下：

protected void Button1_Click(object sender, EventArgs e)

 

        string[] sheng = { " 鼠 ", " 牛 ", " 虎 ", " 兔 ", " 龙 ", " 蛇 ", " 马 ", " 羊 ", " 猴 ", " 鸡 ", " 狗 ", " 猪 " };

        Label1.Text = "";

        for (int i = 0; i < sheng.Length; i++)

        {

            if ((i + 0) % 4 == 0)

            {

                Label1.Text += "</br>" + "&nbsp;";

            }

            {

                Label1.Text += sheng[i].ToString() + "&nbsp;";

            }

        }

 

ctrl+F5 来验证：

 

作业二：两数之间能被3整除的所有数之和的效果图

 

try // 防止错误

        {

                double ma = Convert .ToDouble(TextBox1.Text);

                double fei = Convert .ToDouble(TextBox2.Text);

                double m;

                double a;

                double f = 0;

                if (ma > fei)

                {

                    m = ma;

                    a = fei;

                }

                else

                {

                    m = fei;

                    a = ma; // 设置无论ma 和fei 的大小关系如何大的数始终是m小的为a

                }

                for ( double sum = a; sum <=m; sum++) // 定义变量a<=sum<=m

                {

                    if (sum % 3 == 0) // 定义能被3整除的数

                    {

                        f += sum;

                        Label1.Text = f.ToString();

                    }

                }

            }

        catch

        {

            Label1.Text = " 请输入正确的字符" ;

        }

 

 

作业三：成绩排序页面效果图

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

 

public partial class _Default : System.Web.UI. Page

{

    protected void Page_Load( object sender, EventArgs e)

    {

 

    }

    protected void Button1_Click( object sender, EventArgs e)

    {

        int [] chengji ={1,3,2,7};

        int max=0;

         for ( int i=0;i<chengji.Length-1;i++)

        {

            if (chengji[i]>chengji [i+1]) // 比较当元素前一个大于后一个时

            {

                max=chengji[i];

                chengji[i]=chengji[i+1];

                chengji[i+1]=max;

            }

          max=chengji[i+1]; // 将位置调换

        }

        Label1.Text=max.ToString(); // 输出最大值

 

 

    }

    protected void Button2_Click( object sender, EventArgs e)

    {

        Label2.Text = "" ; // 清空控件

        int [] chengji = { 1, 3, 2, 7 }; // 定义数组

        int max = 0;

        for ( int i = 0; i<chengji.Length; i++)

        {

            for ( int j = 1; j < chengji.Length - i; j++)

                if (chengji[j] < chengji[j - 1])

                {

                    max = chengji[j];

                    chengji[j] = chengji[j - 1];

                    chengji[j - 1] = max;

                }

        

        }

        foreach ( int j in chengji) // 循环

        Label2.Text += j.ToString();

    }

    protected void Button3_Click( object sender, EventArgs e)

    {

        Label3.Text = "" ;

        int [] liebiao = { 1, 5, 2, 6,3 };

        int min = 0;

        for ( int p = 0; p < liebiao.Length; p++)

        {

            for ( int s = 1; s < liebiao.Length - p; s++)

         

                if (liebiao[s] >liebiao[s - 1]) // 当后一个数大于前一个数时

                {

                    min = liebiao[s];

                    liebiao[s] = liebiao[s - 1];

                    liebiao[s - 1] = min;

                }

            }

        foreach ( int s in liebiao)

        Label3.Text += s.ToString()+ "&nbsp&nbsp;" ;

        }

    }