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