CHAPTER11-25.cpp
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上传日期:2007-07-03
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- //文件名:CHAPTER11-25.cpp
- #include <vector>
- #include <set>
- #include <algorithm>
- #include <iostream>
- #include <ostream>
- using namespace std;
- class CInt;
- ostream& operator<<( ostream& osIn, const CInt& rhs );
- #define max(a,b) (a>b)?a:b;
- #define min(a,b) (a<b)?a:b;
- class CInt
- {
- public:
- CInt( int n = 0 ) : m_nVal( n ){}
- CInt( const CInt& rhs ) : m_nVal( rhs.m_nVal ){}
- CInt& operator=( const CInt& rhs ) {m_nVal =
- rhs.m_nVal; return *this;}
- bool operator<( const CInt& rhs ) const
- {return ( m_nVal < rhs.m_nVal );}
- friend ostream& operator<<( ostream& osIn, const CInt& rhs );
- private:
- int m_nVal;
- };
- inline ostream& operator<<( ostream& osIn, const CInt& rhs )
- {
- osIn << "CInt( " << rhs.m_nVal << " )";
- return osIn;
- }
- // Return whether modulus of elem1 is greater than modulus of elem2
- bool mod_greater ( int elem1, int elem2 )
- {
- if ( elem1 < 0 )
- elem1 = - elem1;
- if ( elem2 < 0 )
- elem2 = - elem2;
- return elem1 > elem2;
- };
- int main( )
- {
- // Comparing integers directly using the max algorithm
- int a = 6, b = -7, c = 7;
- const int& result1 = max ( a, b, mod_greater );
- const int& result2 = max ( b, c );
- cout << "The mod_greater of the integers 6 & -7 is: "<< result1 << "." << endl;
- cout << "The larger of the integers -7 & 7 is: "<< result2 << "." << endl;
- cout << endl;
- // Comparing set containers with elements of type CInt using the max algorithm
- CInt c1 = 1, c2 = 2, c3 = 3;
- set<CInt> s1, s2, s3;
- set<CInt>::iterator s1_Iter, s2_Iter, s3_Iter;
- s1.insert ( c1 );
- s1.insert ( c2 );
- s2.insert ( c2 );
- s2.insert ( c3 );
- cout << "s1 = (";
- for ( s1_Iter = s1.begin( ); s1_Iter != --s1.end( ); s1_Iter++ )
- cout << " " << *s1_Iter << ",";
- s1_Iter = --s1.end( );
- cout << " " << *s1_Iter << " )." << endl;
- cout << "s2 = (";
- for ( s2_Iter = s2.begin( ); s2_Iter != --s2.end( ); s2_Iter++ )
- cout << " " << *s2_Iter << ",";
- s2_Iter = --s2.end( );
- cout << " " << *s2_Iter << " )." << endl;
- s3 = max ( s1, s2 );
- cout << "s3 = max ( s1, s2 ) = (";
- for ( s3_Iter = s3.begin( ); s3_Iter != --s3.end( ); s3_Iter++ )
- cout << " " << *s3_Iter << ",";
- s3_Iter = --s3.end( );
- cout << " " << *s3_Iter << " )." << endl << endl;
- s3 = min ( s1, s2 );
- cout << "s3 = min ( s1, s2 ) = (";
- for ( s3_Iter = s3.begin( ); s3_Iter != --s3.end( ); s3_Iter++ )
- cout << " " << *s3_Iter << ",";
- s3_Iter = --s3.end( );
- cout << " " << *s3_Iter << " )." << endl << endl;
- // Comparing vectors with integer elements using the max algorithm
- vector <int> v1, v2, v3, v4, v5;
- vector <int>::iterator Iter1, Iter2, Iter3, Iter4, Iter5;
- int i;
- for ( i = 0 ; i <= 2 ; i++ ) { v1.push_back( i ); }
- int ii;
- for ( ii = 0 ; ii <= 2 ; ii++ ) { v2.push_back( ii ); }
- int iii;
- for ( iii = 0 ; iii <= 2 ; iii++ ) { v3.push_back( 2 * iii ); }
- cout << "Vector v1 is ( " ;
- for ( Iter1 = v1.begin( ) ; Iter1 != v1.end( ) ; Iter1++ ) cout << *Iter1 << " ";
- cout << ")." << endl;
- cout << "Vector v2 is ( " ;
- for ( Iter2 = v2.begin( ) ; Iter2 != v2.end( ) ; Iter2++ ) cout << *Iter2 << " ";
- cout << ")." << endl;
- cout << "Vector v3 is ( " ;
- for ( Iter3 = v3.begin( ) ; Iter3 != v3.end( ) ; Iter3++ ) cout << *Iter3 << " ";
- cout << ")." << endl;
- v4 = max ( v1, v3 );
- v5 = max ( v1, v3 );
- cout << "Vector v4 = max (v1,v3) is ( " ;
- for ( Iter4 = v4.begin( ) ; Iter4 != v4.end( ) ; Iter4++ ) cout << *Iter4 << " ";
- cout << ")." << endl;
- cout << "Vector v5 = min(v1,v3) is ( " ;
- for ( Iter5 = v5.begin( ) ; Iter5 != v5.end( ) ; Iter5++ ) cout << *Iter5 << " ";
- cout << ")." << endl;
- }