Searching array by value

[Townsheriff]

How can I find arrays index by value? for example:

int box = a,array[2]={b,a};

One way would be:

for(int i=0;i<2;i++){
 if ( box == array[i] )
  do stuff;

Is there some function or something that can do it?

Big, big thanks in advance.

[Cubbi]

std::find can search arrays: http://www.cplusplus.com/reference/algorithm/find/