Initial commit

c++/Others/Accessing Data in a File.cpp

@@ -0,0 +1,47 @@
+Accessing Data in a File
+#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 );
+}