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43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
FindMax.cpp - Function template FindMax (Figs 1.17 and 1.18)
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#include <iostream.h>
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#include "mystring.h"
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#include "vector.h"
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#include "IntCell.h"
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// Figures 1.17 and 1.18, but with illegalities commented out
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/**
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* Return the maximum item in array a.
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* Assumes a.size( ) > 0.
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* Comparable objects must provide
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* copy constructor, operator<, operator=
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*/
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template <class Comparable>
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const Comparable & findMax( const vector<Comparable> & a )
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{
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/* 1*/ int maxIndex = 0;
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/* 2*/ for( int i = 1; i < a.size( ); i++ )
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/* 3*/ if( a[ maxIndex ] < a[ i ] )
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/* 4*/ maxIndex = i;
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/* 5*/ return a[ maxIndex ];
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}
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int main( )
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{
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vector<int> v1( 37 );
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vector<double> v2( 40 );
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vector<string> v3( 80 );
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// vector<IntCell> v4( 75 );
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// Additional code to fill in the vectors
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cout << findMax( v1 ) << endl; // OK: Comparable = int
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cout << findMax( v2 ) << endl; // OK: Comparable = double
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cout << findMax( v3 ) << endl; // OK: Comparable = string
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// cout << findMax( v4 ) << endl; // Illegal; operator< undefined
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return 0;
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};
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