// fig05_03.cpp
// Rolling a six-sided die 60,000,000 times.
#include <fmt/format.h>
#include <iostream>
#include <random> 
using namespace std;

int main() {
   // set up random-number generation
   default_random_engine engine{};
   uniform_int_distribution randomDie{1, 6};

   int frequency1{0}; // count of 1s rolled
   int frequency2{0}; // count of 2s rolled
   int frequency3{0}; // count of 3s rolled 
   int frequency4{0}; // count of 4s rolled
   int frequency5{0}; // count of 5s rolled
   int frequency6{0}; // count of 6s rolled

   // summarize results of 60,000,000 rolls of a die
   for (int roll{1}; roll <= 60'000'000; ++roll) {
      // determine roll value 1-6 and increment appropriate counter
      switch (const int face{randomDie(engine)}) {
         case 1:          
            ++frequency1; // increment the 1s counter
            break;
         case 2:          
            ++frequency2; // increment the 2s counter
            break;
         case 3:          
            ++frequency3; // increment the 3s counter
            break;
         case 4:         
            ++frequency4; // increment the 4s counter
            break;
         case 5:          
            ++frequency5; // increment the 5s counter
            break;
         case 6:         
            ++frequency6; // increment the 6s counter
            break;
         default: // invalid value
            cout << "Program should never get here!";
            break;
      } 
   } 

   cout << fmt::format("{:>4}{:>13}\n", "Face", "Frequency"); // headers
   cout << fmt::format("{:>4d}{:>13d}\n", 1, frequency1)
      << fmt::format("{:>4d}{:>13d}\n", 2, frequency2)
      << fmt::format("{:>4d}{:>13d}\n", 3, frequency3)
      << fmt::format("{:>4d}{:>13d}\n", 4, frequency4)
      << fmt::format("{:>4d}{:>13d}\n", 5, frequency5)
      << fmt::format("{:>4d}{:>13d}\n", 6, frequency6);
} 



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