form1.cs

Visual C#2005程序设计教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WinApp4_3判断盈利
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int costs = int.Parse(txtCosts.Text);
            int revenue= int.Parse(txtRevenue.Text);
            /*if嵌套
            if (costs >= revenue)
                if (costs > revenue)
                    lblResult.Text = "盈利情况：亏损"+(costs-revenue)+"元！";
                else
                    lblResult.Text = "盈利情况：持平";
            else
                lblResult.Text = "盈利情况：盈利"+(revenue-costs)+"元！";*/
            if (costs > revenue)
                // 成本大于收入则输出亏损信息
                lblResult.Text = "盈利情况：亏损" + (costs - revenue) + "元！";
            else if (costs == revenue)   // 成本等于收入则输出持平信息
                lblResult.Text = "盈利情况：持平";
            else   // 成本小于收入则输出盈利信息
                lblResult.Text = "盈利情况：盈利" + (revenue - costs) + "元！";

        }
    }
}