C++ exceptions handling

The following snippet illustrates code that should raise 2 exceptions.

Obviously only one exception throwing line will throw an exception .

And indeed it does in Visual C++. Division by 0 is caught and derferencing a NULL pointer is caught.

int test_exception(void)

{

int x = 1;

int y = 0;

int z;

char c;

char *ptr = NULL;

try{

z = x/y; /* This line is commented or the next to have one source of exception */

c = *ptr;

}

catch(...){

printf("Caught an exception \n");

}

return 0;

}

The same code does not behave the same way in the Altera IDE.

One could do the following, which works :

try{

if(y == 0)

throw MyZeroDivException;

else

z = x/y;

if(ptr == NULL)

throw MyDereferenceException;

else

c = *ptr;

}

catch(MyZeroDivException)

{

// Do something

}

catch(MyDereferenceException)

{

// Do something

}

The questions are:

How does NIOS handle division by 0 ?

How does dereference of an incorrect address behave ?

What are the cases when software can generate an exception ?

If there are similar questions about exception handling please refer me to those.

Thank you

Anton