fig13_02.cpp

// fig13_02.cpp
// Standard library vector class template.
#include <fmt/format.h> // C++20: This will be #include <format>
#include <iostream>
#include <ranges>
#include <vector> // vector class-template definition

// display value appended to vector and updated vector size and capacity
void showResult(int value, size_t size, size_t capacity) {
   std::cout << fmt::format("appended: {}; size: {}; capacity: {}\n",
      value, size, capacity);
}

int main() {
   std::vector<int> integers{}; // create vector of ints

   std::cout << "Size of integers: " << integers.size()
      << "\nCapacity of integers: " << integers.capacity() << "\n\n";

   // append 1-10 to integers and display updated size and capacity
   for (int i : std::views::iota(1, 11)) {
      integers.push_back(i); // push_back is in vector, deque and list
      showResult(i, integers.size(), integers.capacity());
   }

   std::cout << "\nOutput integers using iterators: ";

   for (auto constIterator{integers.cbegin()};
      constIterator != integers.cend(); ++constIterator) {
      std::cout << *constIterator << ' ';
   }

   std::cout << "\nOutput integers in reverse using iterators: ";

   // display vector in reverse order using const_reverse_iterator
   for (auto reverseIterator{integers.crbegin()};
      reverseIterator != integers.crend(); ++reverseIterator) {
      std::cout << *reverseIterator << ' ';
   }

   std::cout << "\n";
}

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