s.find c++reference
// find example
#include <iostream> // std::cout
#include <algorithm> // std::find
#include <vector> // std::vector
int main () {
// using std::find with array and pointer:
int myints[] = { 10, 20, 30, 40 };
int * p;
p = std::find (myints, myints+4, 30);
if (p != myints+4)
std::cout << "Element found in myints: " << *p << '\n';
else
std::cout << "Element not found in myints\n";
// using std::find with vector and iterator:
std::vector<int> myvector (myints,myints+4);
std::vector<int>::iterator it;
it = find (myvector.begin(), myvector.end(), 30);
if (it != myvector.end())
std::cout << "Element found in myvector: " << *it << '\n';
else
std::cout << "Element not found in myvector\n";
return 0;
}