4.数学检测
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4.数学检测
新建Windows窗体应用程序
Text -数学检测 Size 500*400
FormBorderStyle-Fixed3D MaximizeBox-False
添加标签控件 Name-timeLabel AutoSize-False BorderStyle-FixedSingle
Size设置为200,30 Text 为空 字号-15.75
标签拖动到窗体的右上角直到出现蓝色分隔线
添加另一个标签控件 字号-15.75 Text-剩余时间 拖动使其与timeLabel左侧对齐
为加法问题添加标签控件
将Text 属性-?(问号) AutoSize-False Size-60,50 字号-18
TextAlign-MiddleCenter Location-75,75 Name-plusLeftLabel
复制标签
选择plusLeftLabel标签，复制粘贴三次，将这三个新标签在plusLeftLabel的右侧排成一行，使用分隔线将其隔开对齐，第二个标签的Text属性为 +(加号)；第三个标签的Name-plusRightLabel ；第四个标签的Text- =(等号);
添加NumericUpDown控件
字号-18 宽度-100 拖动与加法问题的Label控件排成一行 Name-sum
复制粘贴加法问题控件
选择加法问题中的所有五个控件并复制粘贴，向窗体添加五个新的控件，使其在加法控件下方排成一行，使用分割线保持距离.
第二个标签的Text为-(减号),第一个问号标签命名为minusLeftLabel
第二个问号标签命名为-minusRightLabel
NumericUpDown标签命名为-difference
再次复制黏贴控件
第一个标签命名为-timesLeftLabel
第二个标签的Text属性更改为*(乘号)
第三个标签命名为-timesRightLabel
NumericUpDown控件命名为product
再次复制粘贴控件
第一个标签命名-dividedLeftLabel
第二个标签的Text-/(除号)
第三个标签命名-dividedRightLabel
NumericUpDown-quotient
添加按钮 name--startButton Text-开始检测 字号-14
AutoSize-True
将按钮拖动到窗体底部，并将其居中对齐
将 startButton 的 TabIndex 设置为 1 将 sum 控件设置为 2
将 difference 控件设置为 3
将 product 控件设置为 4
将 quotient 控件设置为 5
在class Form1中写入
//向窗体添加 Random对象并称作randomizer
Random randomizer = new Random();
//添加整型int变量称作addend1和addend2
private int addend1;
private int addend2;
//添加 StartTheQuiz()的方法
private void StartTheQuiz()
{ //add
addend1 = randomizer.Next(51);
addend2 = randomizer.Next(51);
plusLeftLabel.Text = addend1.ToString();
plusRightLabel.Text = addend2.ToString();
sum.Value = 0;
}
-----------------------------------------------------------------------
private void startbutton_Click(object sender, EventArgs e)
{
startButton.Enabled = false;
//调用 tartTheQuiz()方法
StartTheQuiz();
}
选择startButton按钮 Click-startbutton_Click
添加倒计时计时器
添加Timer组件 Interval -1000
添加 Timer 组件的Tick 事件--
(在class Form1中写入)private int timeLeft;
private void timer1_Tick(object sender, EventArgs e)
{
if (timeLeft > 0)
{
timeLeft = timeLeft - 1;
timeLabel.Text = timeLeft + @"秒";
//timeLabel.Text = timeLeft + "seconds";
}
else
{
timer1.Stop();
timeLabel.Text = @"时间到";
MessageBox.Show("You didn't finish in time.","Sorry");
sum.Value = addend1 + addend2;
startButton.Enabled = true;
}
}
------------------------------------------------------------------------
private void StartTheQuiz()
{ //add
addend1 = randomizer.Next(51);
addend2 = randomizer.Next(51);
plusLeftLabel.Text = addend1.ToString();
plusRightLabel.Text = addend2.ToString();
sum.Value = 0;
//set time
timeLeft = 20;
timeLabel.Text = timeLeft + @"20秒";
//timeLabel.Text = "30 seconds";
timer1.Start();
}
---------------------------------------------------------------------------------
CheckTheAnswer()方法
private bool CheckTheAnswer()
{
if(addend1 + addend2 == sum.Value)
return true;
else
return false;
}
--------------------------------------------------------
private void timer1_Tick(object sender, EventArgs e)
{
//多加了if(CheckTheAnswer())
if (CheckTheAnswer())
{
timer1.Stop();
MessageBox.Show("You got all the answers right!","Congratulation");
startButton.Enabled = true;
}
else if (timeLeft > 0)
{
//timeLeft = timeLeft - 1;
timeLeft--;
timeLabel.Text = timeLeft + "seconds";
}
else
{
timer1.Stop();
timeLabel.Text = "Time's up!";
MessageBox.Show("You didn't finish in time.","Sorry");
sum.Value = addend1 + addend2;
startButton.Enabled = true;
}
}
-----------------------------------------------------------
选择多个NumericUpDown 控件属性- Enter 事件- answer_Enter
private void answer_Enter(object sender, EventArgs e)
{
NumericUpDown answerBox = sender as NumericUpDown;
if(answerBox != null)
{
int lengthOfAnswer = answerBox.Value.ToString().Length;
answerBox.Select(0,lengthOfAnswer);
}
}
添加减法问题
private int subtrahend;
private int minuend;
修改StartTheQuiz()方法
//sub
minuend = randomizer.Next(1,101);
subtrahend = randomizer.Next(1,minuend);
minusLeftLabel.Text = minuend.ToString();
minusRightLabel.Text = subtrahend.ToString();
difference.Value = 0;
修改CheckTheAnswer()方法
if((addend1 + addend2 == sum.Value)
&&(minuend - subtrahend == difference.Value))
更改Tick事件处理程序
else
{
timer1.Stop();
timeLabel.Text = @"时间到";
MessageBox.Show(@"您没能在规定时间完成", @"对不起");
sum.Value = addend1 + addend2;
difference.Value = minuend - subtrahend;
startButton.Enabled = true;
}
添加整型变量
private int multiplicand;
private int multiplier;
private int dividend;
private int divisor;
修改StartTheQuiz()方法
//multiple
multiplicand = randomizer.Next(2, 11);
multiplier = randomizer.Next(2, 11);
//multiplier =randomizer.Next(100/multiplicand);
timesLeftLabel.Text = multiplicand.ToString();
timesRightLabel.Text = multiplier.ToString();
product.Value = 0;
//divide
divisor = randomizer.Next(2, 11);
int temporaryQuotient = randomizer.Next(2, 11);
dividend = divisor * temporaryQuotient;
dividedLeftLabel.Text = dividend.ToString();
dividedRightLabel.Text = divisor.ToString();
quotient.Value = 0;
修改CheckTheAnswer()方法
if((addend1 + addend2 == sum.Value)
&&(minuend - subtrahend == difference.Value)
&&(multiplicand * multiplier == product.Value)
&&(dividend / divisor == quotient.Value))
更改Tick事件处理程序
else
{
timer1.Stop();
timeLabel.Text = "Time's up!";
MessageBox.Show("You didn't finish in time.", "Sorry");
sum.Value = addend1 + addend2;
difference.Value = minuend - subtrahend;
product.Value = multiplicand * multiplier;
quotient.Value = dividend / divisor;
startButton.Enabled = true;
}
