代码:
n1 = random.Next(1, 5);
n2 = random.Next(6, 10);
n3 = random.Next(11, 15);
m1 = random.Next(1, 3);
if(m1==1)
label1.Text = n1.ToString();
if(m1==2)
label1.Text = n2.ToString();
if(m1==3)
label1.Text = n3.ToString();
label19.Text = m1.ToString();
label19.Text 只显示1或2