质数循环 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        起始数：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <br/>
        结束数：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <br/>
        <asp:Button ID="Button1" runat="server" Text="计算" onclick="Button1_Click" />
        <br/>
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </div>
    </form>
</body>
</html>

　　

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 i_start = int.Parse(TextBox1.Text);
        int i_end = int.Parse(TextBox2.Text);
        int i_beTest;
        Boolean b_testResult;

        string str_result = "质数有:";

        for (i_beTest = i_start; i_beTest <= i_end; i_beTest++)
        {
            b_testResult = iszhishu(i_beTest);
            if (b_testResult == true) { str_result += i_beTest + ","; }
        }
        Label1.Text = str_result;
    }
    protected Boolean iszhishu(int _beTest){
        Boolean _result = true;
        for (int i = _beTest / 2; i >= 2; i--)
        {
            if (-_beTest % i == 0) { _result = false; break; }
        }
        return _result;

    }
}

　　

posted on 2018-09-19 11:31  zoyeln  阅读(121)  评论(0)    收藏  举报

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