Switch中的选择如何不能选择了

Switch中的选择怎么不能选择了？
ComboBox1中有两个值：8和12.
如下代码，执行起来怎么总是执行Case为12的语句。

C/C++ code

void __fastcall TForm1::Button4Click(TObject *Sender){ double degree, rad, pi=3.141592653589793; int sel_item=ComboBox1->ItemIndex;     AnsiString Angel=ComboBox1->Items->Strings[sel_item];   int Angelint = StrToInt(Angel);   degree =StrToFloat(Angel); rad =  degree*pi/180;   Edit33->Text=Angelint;   switch(Angelint)   {        case 8:            Edit33->Text=rad;        case 12:            Edit33->Text=rad/100;        default:             break;    }}

C/C++ code

   switch(Angelint)   {        case 8:            Edit33->Text = rad;            break;        case 12:            Edit33->Text = rad / 100;            break;        default:             break;    }