STL algorithm to compare if 2 vector<int> have same value?

[silverburgh.meryl]

Hi,

Is there a STL algorithm to compare if 2 vector<int> have same values?

Thank you.

 

[Juha Nieminen]

Is there a STL algorithm to compare if 2 vector<int> have same values?

std::equal() is probably the function you are looking for.

 

[Kai-Uwe Bux]

Hi,

Is there a STL algorithm to compare if 2 vector<int> have same values?

Assuming

vector<int> a;
vector<int> b;

and some code that fills them, what is wrong with

a == b


Best

Kai-Uwe Bux

 

[Salt_Peter]

Hi,

Is there a STL algorithm to compare if 2 vector<int> have same values?

Thank you.

That depends what you mean by 'same values'. operator== will do the
job if the two containers are identical (also same size(), capacity()
is ignored). If the containers have the same values but in a different
order then op== returns false.

 

[James Kanze]

(e-mail address removed) writes:

a.size() == b.size() && std::equal(a.begin(), a.end(), b.begin())

Which is exactly what a == b would do. And which tests if the
two vector have the same values IN THE SAME ORDER.

The simplest way to see if they have the same values is to sort
them first, then compare. For types other than int, though,
this may mean that you have to define a possibly arbitrary
ordering relationship.