form1.cs

SSD4 里面Exercise4的答案

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

namespace WindowsApplication2
{
    public partial class Form1 : Form
    {
        private int i,j,k;
        public Form1()
        {
            InitializeComponent();
            i = 0;
        }
        
        private void button1_Click(object sender, EventArgs e)
        {
           if  ( i< 23)
           {
               i++;
               label1.Text = i.ToString();
               label1.Visible = true;
           }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (i < 23 & i>0 )
            {
                i--;
                label1.Text = i.ToString();
                label1.Visible = true;
            }
           
        }

   

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (j < 59)
            {
                j++;
                label2.Text = j.ToString();
                label2.Visible = true;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (j < 59 & j > 0)
            {
                j--;
                label2.Text = j.ToString();
                label2.Visible = true;
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (k < 59)
            {
                k++;
                label3.Text = k.ToString();
                label3.Visible = true;
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (k < 59 & k > 0)
            {
                k--;
                label3.Text = k.ToString();
                label3.Visible = true;
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

    }
}