lower bound c 2b 2b

1// lower_bound/upper_bound example
2#include <iostream>     // std::cout
3#include <algorithm>    // std::lower_bound, std::upper_bound, std::sort
4#include <vector>       // std::vector
5
6int main () {
7  int myints[] = {10,20,30,30,20,10,10,20};
8  std::vector<int> v(myints,myints+8);           // 10 20 30 30 20 10 10 20
9
10  std::sort (v.begin(), v.end());                // 10 10 10 20 20 20 30 30
11
12  std::vector<int>::iterator low,up;
13  low=std::lower_bound (v.begin(), v.end(), 20); //          ^
14  up= std::upper_bound (v.begin(), v.end(), 20); //                   ^
15
16  std::cout << "lower_bound at position " << (low- v.begin()) << '\n'; 
17  std::cout << "upper_bound at position " << (up - v.begin()) << '\n';
18
19  return 0;
20}
21
22// Output
23// lower_bound at position 3
24// upper_bound at position 6