用c#编生肖查询器

int k = Convert.ToInt16(textBox1.Text ); k = (k - 2012) % 12 +4; if (k < 0) k = 12 + k; switch (k) { case 0 :textBox2.Text ="鼠";break ; case 1:textBox2.Text ="牛";break ; case 2:textBox2.Text ="虎";break ; case 3:textBox2.Text ="兔";break ; case 4:textBox2.Text ="龙";break ; case 5:textBox2.Text ="蛇";break ; case 6:textBox2.Text ="马";break ; case 7:textBox2.Text ="羊";break ; case 8:textBox2.Text ="猴";break ; case 9:textBox2.Text ="鸡";break ; case 10:textBox2.Text ="狗";break ; case 11:textBox2.Text ="猪";break ;