11_multiple_columns.cpp

This example shows how to read values from a table with a mixed number of keys and values. The first two lines have one key and one value, the third line has two keys and one value, and the last two lines have two keys and two values.

#include <iostream>
#include <sstream>
#include <slhaea.h>

using namespace std;
using namespace SLHAea;

int main()
{
  stringstream dlha_text(
    "BLOCK COSMOLOGY                                                \n"
    "# identifier(s)  value              comment                    \n"
    "  1              0.72            #  normalized expansion rate h\n"
    "  2              5.72248536E-11  #  entropy density s_0 [GeV^3]\n"
    "  3     0        1               # g_{eff}(T) in tabular format\n"
    "#                T [GeV]         g_{eff}(T)                    \n"
    "  3     1        1.00000000E-05  2.00000000E-00                \n"
    "  3     2        5.00000000E-05  2.00000000E-00                \n"
    "  3     3        1.00000000E-04  4.00000000E-00                \n");

  const Coll dlha(dlha_text);
  const Block cosmology = dlha.at("cosmology");

  cout << cosmology.at("1").at(1) << " == 0.72" << endl;
  cout << cosmology.at("2").at(1) << " == 5.72...E-11" << endl;
  cout << cosmology.at("3", "0").at(2) << " == 1" << endl;

  cout << cosmology.at("3", "1").at(2) << " == 1.0...E-05" << endl;
  cout << cosmology.at("3", "1").at(3) << " == 2.0...E-00" << endl;

  cout << cosmology.at("3", "2").at(2) << " == 5.0...E-05" << endl;
  cout << cosmology.at("3", "2").at(3) << " == 2.0...E-00" << endl;

  cout << cosmology.at("3", "3").at(2) << " == 1.0...E-04" << endl;
  cout << cosmology.at("3", "3").at(3) << " == 4.0...E-00" << endl;
}