Why exception is not handled

Question

Hi

I have tried throwing exception from constructor. It is handled inside main function where object was created.

Why it still terminates ? Should it not been handled by try catch?
https://sololearn.com/compiler-playground/cvX6oq14e546/?ref=app

Answer 1

Try this:

https://sololearn.com/compiler-playground/cfSLA6CqS07n/?ref=app

Answer 2

Oh thanks again. I got it now. I was simply using throw and it would work if I would have used

throw runtime_error(s);

Instead of

throw(s);

Answer 3

Ketan Lalcheta
interesting... since you throw a string, you can also catch a string...🤯.

try
{
A obj;
}
catch(const string& ex)
{
cout << ex;
}

but this is not advised, so the proper way is to wrap it in a runtime_error or a custom exception.
using a struct is simpler, but it's just a preference. The simplest is to just wrap it in a runtime_error, as you mentioned.

#include <exception>

struct oops: std::exception{
const char* what() const noexcept{
return "Oops!\n";
}
}

try{
throw oops();
}catch(std::exception& ex){
std::cout<<ex what();
}

Answer 4

You're throwing a C-style string (const char*) in the constructor of class A, but you're catching a C++ exception (const exception&) in the main function. This is why the exception is not caught.

Answer 5

You're welcome brother 😊

Answer 6

Appreciate that Bob_Li

Answer 7

Sounds good Bob_Li

Answer 8

I changed it to string rather than const char* , but still same behaviour