CODEWITHSUNDEEP
c++
Gary
Gary

Reputation: 1017

Try/catch all block in C++ program not working

Try/catch block in C++ not being "caught." I'm trying to have one catch block to get all exceptions.

#include <iostream>
#include <exception>

using namespace std;

int main()
{
  try
  {
    throw 1;
  }
  catch (exception& e)
  {
    cout << "ERROR: " << e.what() << endl;

    return 1;
  }

  return 0;
}

Upvotes: 0

Views: 267

Answers (2)

NKatUT
NKatUT

Reputation: 519

You are throwing an int, but only catching std::exception. Use a catch(...) to catch everything thrown.

Upvotes: 0

Mooing Duck
Mooing Duck

Reputation: 66922

throw 1; will throw an int. As you do not catch an int, the exception goes uncaught, which is undefined behavior. Though it is possible to throw anything, always prefer to throw a class that derives from std::exception. You can catch an int with catch(int e) or catch(...), but there's really no reason to ever do that.

If you catch with catch(...), then you do not know the type of the object, so cannot access any members, properties, or other aspects, and so you cannot* gather any information about what was thrown. This should never be used.

*There are ways to get information about the thrown object, but it's far easier to just catch the right type in the first place

Upvotes: 6

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