set.insert returns pair: p.first represents location and p.second represents the successfulness : set insert « Set Multiset « C++

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 C++ » Set Multiset » set insert Screenshots
set.insert returns pair: p.first represents location and p.second represents the successfulness
 ```    #include  using std::cout; using std::endl; #include  #include  #include  // ostream_iterator int main() {    double a[ 5 ] = { 2.1, 4.2, 9.5, 2.1, 3.7 };    std::set< double, std::less< double > > doubleSet( a, a + 5 );;    std::ostream_iterator< double > output( cout, " " );    // p represents pair containing const_iterator and bool    std::pair< std::set< double, std::less< double > >::const_iterator, bool > p;    p = doubleSet.insert( 13.8 ); // value not in set    cout << *( p.first ) << ( p.second ? " was" : " was not" ) << " inserted";    cout << "\ndoubleSet contains: ";    std::copy( doubleSet.begin(), doubleSet.end(), output );    cout << endl;    return 0; } /*  13.8 was inserted doubleSet contains: 2.1 3.7 4.2 9.5 13.8  */           ```
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