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#include <algorithm>
#include <string>
#include <iostream>
#include <functional>
using namespace std;
int main()
{
string sarr[] =
{
"alpha", "bravo", "charley", "delta", "echo",
"foxtrot", "golf", "hotel"
};
string *last = sarr + sizeof(sarr) / sizeof(string);
bool result = binary_search(sarr, last, "foxtrot");
cout << (result ? "found " : "didn't find ") << "foxtrot" << '\n';
reverse(sarr, last); // reverse the order of elements
// binary search now fails:
result = binary_search(sarr, last, "foxtrot");
cout << (result ? "found " : "didn't find ") << "foxtrot" << '\n';
// ok when using appropriate
// comparator:
result = binary_search(sarr, last, "foxtrot", greater<string>());
cout << (result ? "found " : "didn't find ") << "foxtrot" << '\n';
}
/*
Displays:
found foxtrot
didn't find foxtrot
found foxtrot
*/
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