c++builbder6.0计算器编程

不知道你想要什么样的，给你个简单计算器，不知道能否帮到你。。
{
double a,b,c;
if (Edit1||Edit2->Text==NULL)
{
ShowMessage("Please enter a number");
}
else
a=this->Edit1->Text.ToDouble();
b=this->Edit2->Text.ToDouble();

if (this->RadioButton1->Checked)
{
c=a+b;
}
if (this->RadioButton2->Checked)
{
c=a-b;
}
if (this->RadioButton3->Checked)
{
c=a*b;
}
if (this->RadioButton4->Checked)
{
if (b==0)
{
ShowMessage("Devide by 0 is not allow");
}
else
{
c=a/b;
}
}
this->Label1->Caption=c;
}

计算器？加减乘除功能乘方不都有了吗，这些功能可以直接实现撒