/* This program shows you how you can format output with C++. */

#include <iostream>      // include I/O Stream definitions
#include <iomanip>       // include manipulator definitions
#include <ios>           // std::streamsize
#include <cstdio>        // old C style printf and ilk
#include <cstddef>
using namespace std;

int main()
{
  // b is a 2x2 "matrix".
  // The C++ counterpart to this F90 RESHAPE command
  // b = RESHAPE( (/1.11111E300,-2.2222E12,3.3333,-4.0E7/),(/2,2/))
  // is this:
  double b[2][2] = {{1.11111E300,-2.2222E12},{3.3333,-4.0E7}};

  // The counterpart to F90's list-directed formatting "Print *, b" is:
  for (size_t i = 0; i != 2; ++i)
    for (size_t j= 0; j != 2; ++j)
      cout << " " << b[i][j];
  cout << endl;
  // The approximate counterpart of F90's explicit formatting
  // with e (general) edit descriptor:  Print "(2e16.4)", b
  for (size_t i = 0; i != 2; ++i) {
    for (size_t j= 0; j != 2; ++j)
      cout << setw(16) << setprecision(4) << b[i][j];
    cout << endl;
  }
  cout << endl;
  // You can also use old C-style output
  for (size_t i = 0; i != 2; ++i) {
    for (size_t j= 0; j != 2; ++j)
      printf ("%12.2e", b[i][j]);
  printf ("\n");
  }
}
// Note: it is generally not a good idea to mix C style
// I/O with C++ style I/O. Output:
//  1.11111e+300 -2.2222e+12 3.3333 -4e+07
//       1.111e+300      -2.222e+12
//            3.333          -4e+07
//
//    1.11e+300   -2.22e+12
//     3.33e+00   -4.00e+07