Description : Searches the range [first1,last1) for the first occurrence of the sequence defined by [first2,last2), and returns an iterator to its first element, or last1 if no occurrences are found.
Example:
std::vector<int> haystack {10, 20, 30, 40, 50, 60, 70, 80, 90};
int needle1[] = {40,50,60,70};
std::vector<int>::iterator it;
it = std::search (haystack.begin(), haystack.end(), needle1, needle1+4);
if (it!=haystack.end()){
std::cout << "needle1 found at position " << (it-haystack.begin()) << '\n';
}
else{
std::cout << "needle1 not found\n";
}