界面
界面.PNG
代碼
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp4
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
int a, b;
string op;
int result;
Random rnd = new Random();
private void btnNew_Click(object sender, EventArgs e)
{
a = rnd.Next(9) + 1;
b = rnd.Next(9) + 1;
int c = rnd.Next(4);
switch(c)
{
case 0:
op = "+";
result = a + b;
break;
case 1:
op = "-";
result = a - b;
break;
case 2:
op = "×";
result = a * b;
break;
case 3:
op = "÷";
result = a / b;
break;
}
lblA.Text = a.ToString();
lblB.Text = b.ToString();
lblOp.Text = op;
txtAnswer.Text = "";
}
private void btnJudge_Click(object sender, EventArgs e)
{
string str = txtAnswer.Text;
double d = double.Parse(str);
string disp = a + op + b +" = "+str;
if (d == result) // if( Math.Abs(d-result)< 1e-3 )
disp += " YES!";
else
disp += " NO!";
lstDisp.Items.Add(disp);
}
}
}
