Rethrowing exceptions

Question

Why doesn\'t the following doesn\'t handle the exception that was rethrown? I tried all the combinations but none of them would show the output in last catch so I\'m confused!

Answer 1

Rethrown exception is supposed to be caught by some other try..catch block, not the catch handler of the same try block. See this example:

using namespace std;
class Base
{
public:
    virtual ~Base(){}
};

class Derived : public Base
{
};

void f()
{
    try
    {
        throw Derived();
    }
    catch(Derived& ex)
    {
        cout<<"Caught in f\n";
        throw;
    }

}

int main()
{
    try
    {
        f();
    }
    catch(Base& b)
    {
        cout<<"Caught in main\n";
    }

    return 0;
}

output is:

Caught in f

Caught in main