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Hi,

What will happen if i access an element which is bigger than the
container?
e.g.
vector<int> aVector(1);
cout << aVector[6] << endl?
// or can I do this:
aVector[6] = 3;

How about a Map?
map<int, int> aMap(1);
aMap[2] = 1;
aMap[1] = 2;

wrote:
> Hi,
>
> What will happen if i access an element which is bigger than the
> container?
> e.g.
> vector<int> aVector(1);
> cout << aVector[6] << endl?

/the above line causes undefined behaviour, ANYTHING could happen from
now one.

> // or can I do this:
> aVector[6] = 3;

//Same as above

> How about a Map?
> map<int, int> aMap(1);
> aMap[2] = 1;
> aMap[1] = 2;

No, they are both fine, assuming you remove the UB above.

What book are you reading that does not discuss this?

Ben Pope
--
I'm not just a number. To many, I'm known as a string...

wrote:
> What will happen if i access an element which is bigger than the
> container?

Usually the behaviour is undefined. If you use .at() instead of
the indexing, then 'vector' throws and you can catch the exception.

> e.g.
> vector<int> aVector(1);
> cout << aVector[6] << endl?
> // or can I do this:
> aVector[6] = 3;

The behaviour is undefined.

> How about a Map?
> map<int, int> aMap(1);
> aMap[2] = 1;
> aMap[1] = 2;

'std::map' actually inserts if the element doesn't exist.

V
--
Please remove capital As from my address when replying by mail