Number reversal game: Difference between revisions

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 =={{header|C++}}==
+===Version 1 (crude)===
 The C code can be used with C++, although the following uses proper C++ iostreams:
 <syntaxhighlight lang="cpp">void number_reversal_game()
@@ Line 1,187: / Line 1,188: @@
 This uses the same helper functions as the C version.
-=== Alternate version using the C++ standard library ===
+===Version 2 (with C++ standard library)===
+====Version 2.1====
 This version uses the C++ standard library (note that none of the C helper functions are needed).
 <syntaxhighlight lang="cpp">
@@ Line 1,239: / Line 1,241: @@
             << "You needed " << score << " reversals." << std::endl;
   return 0;
+}
+</syntaxhighlight>
+====Version 2.2====
+<syntaxhighlight lang="cpp">
+// Written by Katsumi -- twitter.com/realKatsumi_vn
+// Compile with: g++ -std=c++20 -Wall -Wextra -pedantic NumberReversal.cpp -o NumberReversal
+#include <iostream>
+#include <algorithm>
+#include <utility>
+#include <functional>
+#include <iterator>
+#include <random>
+#include <vector>
+#include <string>
+template <class T>
+bool Sorted(std::vector<T> list) {
+    return std::adjacent_find(list.begin(), list.end(), std::greater<T>()) == list.end();
+}
+template <class T>
+std::string VectorRepr(std::vector<T> list) {
+    auto Separate = [](std::string a, int b) {
+        return std::move(a) + ", " + std::to_string(b);
+    };
+    return std::accumulate(std::next(list.begin()), list.end(), std::to_string(list[0]), Separate);
+}
+int main() {
+    const std::string IntroText = "NUMBER REVERSAL GAME\n"
+                                  "based on a \"task\" on Rosetta Code -- rosettacode.org\n"
+                                  "by Katsumi -- twitter.com/realKatsumi.vn\n\n";
+    // Don't ever write this s**tty code...
+    // std::srand(std::time(0));
+    // Do this instead:
+    std::random_device Device;
+    std::mt19937_64 Generator(Device());
+    std::vector<int> List = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+    std::shuffle(List.begin(), List.end(), Generator);
+    std::cout << IntroText;
+    int Moves, PlayerInput;
+    while (!Sorted(List)) {
+        std::cout << "Current list: [" << VectorRepr(List) << "]\n"
+                     "Digits to reverse? (2-9) ";
+        while (true) {
+            std::cin >> PlayerInput;
+            if (PlayerInput < 2 || PlayerInput > 9)
+                std::cout << "Please enter a value between 2 and 9.\n"
+                             "Digits to reverse? (2-9) ";
+            else
+                break;
+        }
+        std::reverse(List.begin(), List.begin()+PlayerInput);
+        ++Moves;
+    }
+    std::cout << "Yay! You sorted the list! You've made " << Moves << " moves.\n";
+    return 0;
 }
 </syntaxhighlight>