Essential C++

equal()

Returns true if the two sequences are equal for the number of elements contained within the first container. By default, the equality operator is used. Alternatively, a binary function object or pointer to function can be supplied.

#include <algorithm> 
class EqualAndOdd{ 
public: 
    bool operator()( int v1, int v2 ) 
       { return ((v1==v2) && (v1%2)); } 
}; 

int ia1[] = { 1,1,2,3,5,8,13 }; 
int ia2[] = { 1,1,2,3,5,8,13,21,34 }; 
res = equal( ia1, ia1+7, ia2 ); // true 
res = equal( ia1, ia1+7, ia2, equalAndOdd() ); // false