Clang tidy 2022 Day 10.

2022/puzzle-10-01.cc

@@ -0,0 +1,59 @@
+//
+// Created by Matthew Gretton-Dann on 09/12/2022.
+//
+
+#include <array>
+#include <iostream>
+#include <numeric>
+#include <string>
+#include <utility>
+
+using Int = std::int64_t;
+using UInt = std::uint64_t;
+
+struct State
+{
+  auto addx(UInt incr, Int delta)
+  {
+    pc_ += incr;
+    if (current_sample_ != sample_points_.end() && *current_sample_ < pc_) {
+      std::cout << "Sample point: " << *current_sample_ << " value: " << x_ << " score "
+                << x_ * *current_sample_ << " total " << score_ << '\n';
+      score_ += x_ * *current_sample_;
+      ++current_sample_;
+    }
+    x_ += delta;
+  }
+
+  [[nodiscard]] auto score() const noexcept -> Int { return score_; }
+
+  Int x_{1};
+  Int score_{0};
+  UInt pc_{1};
+  static std::array<UInt, 6> const sample_points_;
+  std::array<UInt, 6>::const_iterator current_sample_{sample_points_.begin()};
+};
+
+std::array<UInt, 6> const State::sample_points_ = {20, 60, 100, 140, 180, 220};
+
+auto main() -> int
+{
+  std::string line;
+  State state;
+  using namespace std::literals::string_literals;
+
+  while (std::getline(std::cin, line) && !line.empty()) {
+    if (line == "noop"s) {
+      state.addx(1, 0);
+    }
+    else if (line.substr(0, 5) == "addx "s) {
+      state.addx(2, std::stoll(line.substr(5)));
+    }
+    else {
+      std::cerr << "Unable to interpret: " << line << '\n';
+      return EXIT_FAILURE;
+    }
+  }
+  std::cout << "Score: " << state.score() << '\n';
+  return 0;
+}

2022/puzzle-10-02.cc

@@ -0,0 +1,74 @@
+//
+// Created by Matthew Gretton-Dann on 09/12/2022.
+//
+
+#include <array>
+#include <iostream>
+#include <numeric>
+#include <string>
+#include <utility>
+
+using Int = std::int64_t;
+using UInt = std::uint64_t;
+
+struct State
+{
+  auto draw_crt() const
+  {
+    Int const loc{(static_cast<Int>(pc_) - 1) % 40};
+    if (std::abs(x_ - loc) < 2) {
+      std::cout << '#';
+    }
+    else {
+      std::cout << '.';
+    }
+    if (loc == 39) {
+      std::cout << '\n';
+    }
+  }
+
+  auto addx(UInt incr, Int delta)
+  {
+    for (unsigned i = 0; i < incr; ++i) {
+      draw_crt();
+      ++pc_;
+    }
+    if (current_sample_ != sample_points_.end() && *current_sample_ < pc_) {
+      score_ += x_ * *current_sample_;
+      ++current_sample_;
+    }
+    x_ += delta;
+  }
+
+  [[nodiscard]] auto score() const noexcept -> Int { return score_; }
+
+  Int x_{1};
+  Int score_{0};
+  UInt pc_{1};
+  static std::array<UInt, 6> const sample_points_;
+  std::array<UInt, 6>::const_iterator current_sample_{sample_points_.begin()};
+};
+
+std::array<UInt, 6> const State::sample_points_ = {20, 60, 100, 140, 180, 220};
+
+auto main() -> int
+{
+  std::string line;
+  State state;
+  using namespace std::literals::string_literals;
+
+  while (std::getline(std::cin, line) && !line.empty()) {
+    if (line == "noop"s) {
+      state.addx(1, 0);
+    }
+    else if (line.substr(0, 5) == "addx "s) {
+      state.addx(2, std::stoll(line.substr(5)));
+    }
+    else {
+      std::cerr << "Unable to interpret: " << line << '\n';
+      return EXIT_FAILURE;
+    }
+  }
+  std::cout << "Score: " << state.score() << '\n';
+  return 0;
+}