48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
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Accessing Data in a File
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#include <algorithm>
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#include <cstdlib>
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#include <fstream>
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#include <functional>
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#include <iostream>
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#include <iterator>
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#include <vector>
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using namespace std;
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template <class T>
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void print(T& c){
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for( typename T::iterator i = c.begin(); i != c.end(); i++ ){
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std::cout << *i << endl;
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}
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}
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int main(){
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vector<int> output_data( 10 );
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generate( output_data.begin(), output_data.end(), rand );
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transform( output_data.begin(), output_data.end(),output_data.begin(), bind2nd( modulus<int>(), 10 ) );
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ofstream out( "data.txt" );
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if( !out )
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{
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cout << "Couldn't open output file\n";
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return 0;
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}
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copy( output_data.begin(), output_data.end(),ostream_iterator<int>( out, "\n" ) );
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out.close();
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ifstream in( "data.txt" );
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if( !in )
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{
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cout << "Couldn't open input file\n";
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return 0;
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}
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vector<int> input_data( (istream_iterator<int>( in )),istream_iterator<int>() );
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in.close();
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print( output_data );
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print( input_data );
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}
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