A generic class for tabular data - C++ File Stream

C++ examples for File Stream:cout

  1. HOME
  2. C++
  3. File Stream
  4. cout

Description

A generic class for tabular data

Demo Code

#include <iostream>
#include <iomanip>
#include <string>
#include <vector>

using namespace std;
template<typename T>
class TableFormatter {
public://from   w  w w  .j av a2s.com
   TableFormatter(basic_ostream<T>& os) : out_(os) {}
  ~TableFormatter() {out_ << flush;}
   template<typename valT>
   void writeTableRow(const vector<valT>& v, int width);
private:
  basic_ostream<T>& out_;
};

template<typename T>    
template<typename valT> 
void TableFormatter<T>::writeTableRow(const std::vector<valT>& v, int width) {
   ios_base::fmtflags flags = out_.flags();
   out_.flush();
   out_ << setprecision(2) << fixed;  // Set the precision, in case
                                      // this is floating-point data
   for (vector<valT>::const_iterator p = v.begin();p != v.end(); ++p)
     out_ << setw(width) << left << *p;  // Set the width, justify, and write the element
   out_ << endl;     
   out_.setf(flags); // Set the flags back to normal
}

int main() {

   TableFormatter<char> fmt(cout);

   vector<string> vs;

   vs.push_back( "Sunday" );
   vs.push_back( "Monday" );
   vs.push_back( "Tuesday" );

   fmt.writeTableRow(vs, 12);
   fmt.writeTableRow(vs, 12);
   fmt.writeTableRow(vs, 12);

   vector<double> vd;
   vd.push_back(4.0);
   vd.push_back(3.0);
   vd.push_back(2.0);
   vd.push_back(1.0);

   fmt.writeTableRow(vd, 5);
}

Result


Related Tutorials