验证按钮不正确？

Question

因此，我需要制作一个在 2 个标签中生成 2 个数字的应用程序，然后用户必须输入这 2 个数字的附加值作为答案。 然后我需要制作一个按钮来检查用户是否在文本框中输入了正确的解决方案......

但是，我制作的检查按钮每次都将答案显示为“不正确”......我做错了什么？

private void generatebutton_Click(object sender, EventArgs e

    {

            //Declaring Variables for Generate button
            int answer = 0;
            Random rand = new Random();
            var intNum1 = rand.Next(100, 500);
            var intNum2 = rand.Next(100, 500);
            answer = intNum1 + intNum2;


            //Generate integer number 1 in first label 
            firstnumberlabel.Text = intNum1.ToString();

            //Generate integer number 2 in second label
            secondNumberlabel.Text = intNum2.ToString();
     }

    private void checkButton_Click(object sender, EventArgs e)

      {
            //Declaring variables for answer label
            int userInput = 0;
            int answer = 0;
            Random rand = new Random();
            var intNum1 = rand.Next(100, 500);
            var intNum2 = rand.Next(100, 500);
            answer = intNum1 + intNum2;

            if (int.TryParse(txtanswer.Text, out userInput))
            {
                if (userInput == answer)
                {
                    // Display success message
                    MessageBox.Show("Correct!");
                }

                else 
                {
                    // Display wrong answer message
                    MessageBox.Show("Incorrect!");
                }
        }
        else
        {
            // show message that invalid input
        } 
    }

    private void exitButton_Click(object sender, EventArgs e)
    {
        //Closes Application
        this.Close();
    }

    private void button4_Click(object sender, EventArgs e)
    {
        //Clears text box
        txtanswer.Text = "";
    }
}

}

Answer 1

您将用户的答案与一组新的随机数进行比较，而不是原始的两个随机数。

在您的 checkButton_Click 事件中，替换 int answer = 0 之后的 4 行； 类似于answer = int.Parse(firstnumberlabel.Text) + int.Parse(secondnumberlabel.Text);

您仍然需要添加一些输入完整性检查，以避免出现异常，以防用户尝试在不提供数字的情况下检查答案。

Answer 2

修改如下将工作。 您正在创建新的随机数以找到错误的答案

private void generatebutton_Click(object sender, EventArgs e
{
        //Declaring Variables for Generate button
        Random rand = new Random();
        var intNum1 = rand.Next(100, 500);
        var intNum2 = rand.Next(100, 500);

        //Generate integer number 1 in first label 
        firstnumberlabel.Text = intNum1.ToString();

        //Generate integer number 2 in second label
        secondNumberlabel.Text = intNum2.ToString();
 }

private void checkButton_Click(object sender, EventArgs e)
{
    int userInput = 0;
    int answer = int.Parse(firstnumberlabel.Text) + int.Parse(secondnumberlabel.Text);
    if (int.TryParse(txtanswer.Text, out userInput))
    {
            if (userInput == answer)
            {
                // Display success message
                MessageBox.Show("Correct!");
            }
            else 
            {
                // Display wrong answer message
                MessageBox.Show("Incorrect!");
            }
    }
    else
    {
       MessageBox.Show("Please enter a valid answer!");
    } 
}

private void exitButton_Click(object sender, EventArgs e)
{
    //Closes Application
    this.Close();
}

private void button4_Click(object sender, EventArgs e)
{
    //Clears text box
    txtanswer.Text = "";
}