关于vc下RTTI的disable问题

gftgft

在用动态类型转换时需要配合RTTI,vc下好象默认disabled,大多说法在"roject Settings/C++/C++ Language",可却找不到有如是设置项,ps:我用的是vc++6(cn),Inter compier8

附错误信息:error #259: run-time support for RTTI is disabled
    TextBox& ct1 = dynamic_cast<TextBox&>;(ct);

gftgft

就这么说好了，下面一段测试程序运行没问题的告诉我你如何配置rtti参数:
#include <iostream>;
#include <stdexcept>;
#include <typeinfo>;

using namespace std;

class control
{
public:
            virtual void foo() {}
};

class TextBox : public control {};
class EditBox : public TextBox {};
class Button  : public control {};

void Paint(control& ct)
{
            try
            {
                        TextBox& ct1 = dynamic_cast<TextBox&>;(ct);
                        cout<<"aint TextBox successful!"<<endl;
            }
            catch(bad_cast)
            {
                        cout<<"Can't Paint TextBox! error!\a"<<endl;
            }
}

int main()
{
            control ct;
            Paint(ct);

            Button bt;
            Paint(bt);

            TextBox tb;
            Paint(tb);

            EditBox ed;
            Paint(ed);

            return 0;

}

faint_u

现在手头只有vs2003,这是编译的错误信息
warning C4541: 'dynamic_cast' used on polymorphic type 'control' with /GR-; unpredictable behavior may result
在上面按F1就能够在MSDN中查到：
identifier' used on polymorphic type 'type' with /GR-; unpredictable behavior may result

You tried to use a feature that requires run-time type information without enabling run-time type information. Recompile with /GR.

但是你用的是intel的编译器，估计就得看他的编译选项了