Mega Code Archive
Use binary_search to locate a value in a vector
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#include <iostream>
using std::cout;
using std::endl;
#include <algorithm>
#include <vector>
#include <iterator>
int main()
{
int a[ 10 ] = { 10, 2, 17, 5, 16, 8, 13, 11, 20, 7 };
std::vector< int > v( a, a + 10 ); // copy of a
std::ostream_iterator< int > output( cout, " " );
cout << "Vector v contains: ";
std::copy( v.begin(), v.end(), output ); // display output vector
// locate first occurrence of 16 in v
std::vector< int >::iterator location;
// use binary_search to locate 13 in v
if ( std::binary_search( v.begin(), v.end(), 13 ) )
cout << "\n\n13 was found in v";
else
cout << "\n\n13 was not found in v";
cout << endl;
return 0;
}
/*
Vector v contains: 10 2 17 5 16 8 13 11 20 7
13 was not found in v
*/
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