CHAPTER11-23.cpp
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上传日期:2007-07-03
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- //文件名:CHAPTER11-23.cpp
- #include <vector>
- #include <algorithm>
- #include <functional> //For greater<int>( )
- #include <iostream>
- // Return whether modulus of elem1 is less than modulus of elem2
- bool mod_lesser ( int elem1, int elem2 )
- {
- if ( elem1 < 0 )
- elem1 = - elem1;
- if ( elem2 < 0 )
- elem2 = - elem2;
- return elem1 < elem2;
- }
- int main( )
- {
- using namespace std;
- vector <int> v1;
- vector <int>::iterator Iter1;
- pair < vector <int> :: iterator , vector <int> :: iterator > Result1, Result2, Result3;
- // Constructing vectors v1a & v1b with default less than ordering
- int i;
- for ( i = -1 ; i <= 4 ; i++ )
- { v1.push_back( i ); }
- int ii;
- for ( ii =-3 ; ii <= 0 ; ii++ )
- { v1.push_back( ii ); }
- sort ( v1.begin ( ) , v1.end ( ) );
- cout << "Original vector v1 with range sorted by then "
- << "binary predicate less than is v1 = ( " ;
- for ( Iter1 = v1.begin( ) ; Iter1 != v1.end( ) ; Iter1++ )
- cout << *Iter1 << " ";
- cout << ")." << endl;
- // Constructing vectors v2 with range sorted by greater
- vector <int> v2 ( v1 );
- vector <int>::iterator Iter2;
- sort ( v2.begin ( ) , v2.end ( ) , greater<int> ( ) );
- cout << "Original vector v2 with range sorted by then "
- << "binary predicate greater is v2 = ( " ;
- for ( Iter2 = v2.begin ( ) ; Iter2 != v2.end ( ) ; Iter2++ )
- cout << *Iter2 << " ";
- cout << ")." << endl;
- // Constructing vectors v3 with range sorted by mod_lesser
- vector <int> v3 ( v1 );
- vector <int>::iterator Iter3;
- sort ( v3.begin ( ) , v3.end ( ) , mod_lesser );
- cout << "Original vector v3 with range sorted by then "
- << "binary predicate mod_lesser is v3 = ( " ;
- for ( Iter3 = v3.begin ( ) ; Iter3 != v3.end ( ) ; Iter3++ )
- cout << *Iter3 << " ";
- cout << ")." << endl << endl;
- // equal_range of 3 in v1 with default binary predicate less <int> ( )
- Result1 = equal_range ( v1.begin ( ) , v1.end ( ) , 3 );
- cout << "The lower_bound in v1 for the element with a value of 3 is: "
- << *Result1.first << "." << endl;
- cout << "The upper_bound in v1 for the element with a value of 3 is: "
- << *Result1.second << "." << endl;
- cout << "The equivalence class for the element with a value of 3 in"
- << "n v1 includes the elements: ( ";
- for ( Iter1 = Result1.first ; Iter1 != Result1.second ; Iter1++ )
- cout << *Iter1 << " ";
- cout << ")." << endl << endl;
- // equal_range of 3 in v2 with the binary predicate greater <int> ( )
- Result2 = equal_range ( v2.begin ( ) , v2.end ( ) , 3 , greater <int> ( ) );
- cout << "The lower_bound in v2 for the element with a value of 3 is: "
- << *Result2.first << "." << endl;
- cout << "The upper_bound in v2 for the element with a value of 3 is: "
- << *Result2.second << "." << endl;
- cout << "The equivalence class for the element with a value of 3 in"
- << "n v2 includes the elements: ( ";
- for ( Iter2 = Result2.first ; Iter2 != Result2.second ; Iter2++ )
- cout << *Iter2 << " ";
- cout << ")." << endl << endl;
- // equal_range of 3 in v3 with the binary predicate mod_lesser
- Result3 = equal_range ( v3.begin ( ) , v3.end ( ) , 3 ,mod_lesser );
- cout << "The lower_bound in v3 for the element with a value of 3 is: "
- << *Result3.first << "." << endl;
- cout << "The upper_bound in v3 for the element with a value of 3 is: "
- << *Result3.second << "." << endl;
- cout << "The equivalence class for the element with a value of 3 in"
- << "n v3 includes the elements: ( ";
- for ( Iter3 = Result3.first ; Iter3 != Result3.second ; Iter3++ )
- cout << *Iter3 << " ";
- cout << ")." << endl << endl;
- }