fig06_06.cpp

// fig06_06.cpp
// Printing a student grade distribution as a primitive bar chart.
#include <fmt/format.h>
#include <iostream>
#include <array>

int main() {
   constexpr std::array frequencies{0, 0, 0, 0, 0, 0, 1, 2, 4, 2, 1};

   std::cout << "Grade distribution:\n";

   // for each element of frequencies, output a bar of the chart
   for (int i{0}; const int& frequency : frequencies) {
      // output bar labels ("00-09:", ..., "90-99:", "100:")
      if (i < 10) {
         std::cout << fmt::format("{:02d}-{:02d}: ",
            i * 10, (i * 10) + 9);
      }
      else {
         std::cout << fmt::format("{:>5d}: ", 100);
      }

      ++i;

      // print bar of asterisks
      for (int stars{0}; stars < frequency; ++stars) {
         std::cout << '*';
      }

      std::cout << '\n'; // start a new line of output
   }
}



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