{
public?partial?class?Form1?:?Form
{
private?int?a;
private?int?b;
Random?ra;
public?Form1()
{
InitializeComponent();
calc();
}
private?void?button1_Click(object?sender,?EventArgs?e)
{
int?c?=?int.Parse(textBox1.Text);
if?(c?==?a?+?b)
{
MessageBox.Show("答題正確！將生成下壹題。");
calc();
}
else
{
MessageBox.Show("答題錯誤！將返回重新答題。");
}
}
private?void?calc()
{
Random?ra?=?new?Random(unchecked((int)DateTime.Now.Ticks));
a?=ra.Next(1,?100);
b?=?ra.Next(1,?100);
label1.Text?=?a.ToString()?+?"+"?+?b.ToString();
}
}
}