菜鸟求指教，为什么说出现错误。

switch (a)
case 1:printf("1 Good morning\n"); break;
case 2:printf("2 Good afternoon\n"); break;
case 3:printf("3 night\n"); break;
default :printf("Selection error!"); break;
===============>
switch (a)
{
case 1:printf("1 Good morning\n"); break;
case 2:printf("2 Good afternoon\n"); break;
case 3:printf("3 night\n"); break;
default :printf("Selection error!"); break;
}
括号被你吃了？