n**d
发帖数: 9764 | 1 How come this code crash in runtime by VC++ 6.0?
#include
using namespace std;
class Pet { public: virtual ~Pet(){}};
class Cat : public Pet {};
int main() {
Pet* b = new Cat; // Upcast
Cat* d = dynamic_cast(b);
} |
h*******e
发帖数: 225 | 2 VC6 is buggy. Use something else.
【在 n**d 的大作中提到】
: How come this code crash in runtime by VC++ 6.0?
: #include
: using namespace std;
: class Pet { public: virtual ~Pet(){}};
: class Cat : public Pet {};
: int main() {
: Pet* b = new Cat; // Upcast
: Cat* d = dynamic_cast(b);
: }
|
n**d
发帖数: 9764 | 3 How could it be in the market if it has so obvious bug?!
【在 h*******e 的大作中提到】
: VC6 is buggy. Use something else.
|
s***e
发帖数: 122 | 4 You could turn on the RTTI (in Project->Setting->C/C++->C/C++ Language) to
avoid this. You should have noticed the warning C4541: 'dynamic_cast' used
on polymorphic type ...
Anyway, this should be part of the C++ language, not an option.
【在 n**d 的大作中提到】
: How could it be in the market if it has so obvious bug?!
|
d***q
发帖数: 1119 | 5 vc 6.0 only covers 80% std c++,don't expect you can use tricks with this
compiler |
