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// search algorithm example
#include <iostream> // std::cout
#include <algorithm> // std::search
#include <vector> // std::vector
bool mypredicate (int i, int j) {
return (i==j);
}
int main () {
std::vector<int> haystack;
// set some values: haystack: 10 20 30 40 50 60 70 80 90
for (int i=1; i<10; i++) haystack.push_back(i*10);
// using default comparison:
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";
// using predicate comparison:
int needle2[] = {20,30,50};
it = std::search (haystack.begin(), haystack.end(), needle2, needle2+3, mypredicate);
if (it!=haystack.end())
std::cout << "needle2 found at position " << (it-haystack.begin()) << '\n';
else
std::cout << "needle2 not found\n";
return 0;
}
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