construct a table of circular areas : ostrstream « File « C++






  1. C++
  2. File
  3. ostrstream

construct a table of circular areas

  
#include <iostream>
#include <sstream>
#include <locale>
#include <iomanip>

using namespace std;

int main()
{
  locale usloc("English_US");

  ostringstream ostr;

  // Give a new, empty string to ostr.
  ostr.str(string());

  // construct a table of circular areas.
  ostr << setprecision(4) << showpoint << fixed << left;
  ostr << "Diameter    Area\n";

  cout << "A table of circular areas.\n";
  for(int i=1; i < 10; ++i)
    ostr << left << "   " << setw(6) << i << setw(8) << right << i*3.1416 << endl;

  cout << ostr.str();

  return 0;
}








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