Add exercise yacht

config.json

@@ -1077,6 +1077,20 @@
           "control_flow_loops",
           "pointers"
         ]
+      },
+      {
+        "slug": "yacht",
+        "name": "Yacht",
+        "uuid": "dd360788-1dff-4a5d-89af-5bbd1199ae86",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2,
+        "topics": [
+          "arrays",
+          "control_flow_if_statements",
+          "control_flow_loops",
+          "structs"
+        ]
       }
     ]
   },

exercises/practice/yacht/.docs/instructions.md

@@ -0,0 +1,35 @@
+# Instructions
+
+The dice game [Yacht][yacht] is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor.
+In the game, five dice are rolled and the result can be entered in any of twelve categories.
+The score of a throw of the dice depends on category chosen.
+
+## Scores in Yacht
+
+| Category        | Score                  | Description                              | Example             |
+| --------------- | ---------------------- | ---------------------------------------- | ------------------- |
+| Ones            | 1 × number of ones     | Any combination                          | 1 1 1 4 5 scores 3  |
+| Twos            | 2 × number of twos     | Any combination                          | 2 2 3 4 5 scores 4  |
+| Threes          | 3 × number of threes   | Any combination                          | 3 3 3 3 3 scores 15 |
+| Fours           | 4 × number of fours    | Any combination                          | 1 2 3 3 5 scores 0  |
+| Fives           | 5 × number of fives    | Any combination                          | 5 1 5 2 5 scores 15 |
+| Sixes           | 6 × number of sixes    | Any combination                          | 2 3 4 5 6 scores 6  |
+| Full House      | Total of the dice      | Three of one number and two of another   | 3 3 3 5 5 scores 19 |
+| Four of a Kind  | Total of the four dice | At least four dice showing the same face | 4 4 4 4 6 scores 16 |
+| Little Straight | 30 points              | 1-2-3-4-5                                | 1 2 3 4 5 scores 30 |
+| Big Straight    | 30 points              | 2-3-4-5-6                                | 2 3 4 5 6 scores 30 |
+| Choice          | Sum of the dice        | Any combination                          | 2 3 3 4 6 scores 18 |
+| Yacht           | 50 points              | All five dice showing the same face      | 4 4 4 4 4 scores 50 |
+
+If the dice do not satisfy the requirements of a category, the score is zero.
+If, for example, _Four Of A Kind_ is entered in the _Yacht_ category, zero points are scored.
+A _Yacht_ scores zero if entered in the _Full House_ category.
+
+## Task
+
+Given a list of values for five dice and a category, your solution should return the score of the dice for that category.
+If the dice do not satisfy the requirements of the category your solution should return 0.
+You can assume that five values will always be presented, and the value of each will be between one and six inclusively.
+You should not assume that the dice are ordered.
+
+[yacht]: https://en.wikipedia.org/wiki/Yacht_(dice_game)

exercises/practice/yacht/.meta/config.json

@@ -0,0 +1,21 @@
+{
+  "authors": [
+    "ahans"
+  ],
+  "files": {
+    "solution": [
+      "yacht.c",
+      "yacht.h"
+    ],
+    "test": [
+      "test_yacht.c"
+    ],
+    "example": [
+      ".meta/example.c",
+      ".meta/example.h"
+    ]
+  },
+  "blurb": "Score a single throw of dice in the game Yacht.",
+  "source": "James Kilfiger, using wikipedia",
+  "source_url": "https://en.wikipedia.org/wiki/Yacht_(dice_game)"
+}

exercises/practice/yacht/.meta/example.c

@@ -0,0 +1,108 @@
+#include "yacht.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+static int number_of_x(dice_t dice, int x)
+{
+   int sum = 0;
+   for (int i = 0; i < 5; ++i) {
+      if (dice.faces[i] == x)
+         sum += x;
+   }
+   return sum;
+}
+
+typedef struct {
+   uint8_t faces[6];
+} count_t;
+
+static count_t count(const dice_t dice)
+{
+   count_t counts = { 0 };
+   for (int i = 0; i < 5; ++i) {
+      assert(dice.faces[i] >= 1 && dice.faces[i] <= 6);
+      counts.faces[dice.faces[i] - 1] += 1;
+   }
+   return counts;
+}
+
+static int has_count(count_t counts, int n)
+{
+   for (int i = 0; i < 6; ++i) {
+      if (counts.faces[i] == n) {
+         return i + 1;
+      }
+   }
+   return 0;
+}
+
+static int sum(dice_t dice)
+{
+   int s = 0;
+   for (int i = 0; i < 5; ++i) {
+      s += dice.faces[i];
+   }
+   return s;
+}
+
+int score(dice_t dice, category_t category)
+{
+   switch (category) {
+      case ONES:
+         return number_of_x(dice, 1);
+      case TWOS:
+         return number_of_x(dice, 2);
+      case THREES:
+         return number_of_x(dice, 3);
+      case FOURS:
+         return number_of_x(dice, 4);
+      case FIVES:
+         return number_of_x(dice, 5);
+      case SIXES:
+         return number_of_x(dice, 6);
+      case FULL_HOUSE: {
+         const count_t counts = count(dice);
+         if (has_count(counts, 3) && has_count(counts, 2)) {
+            return sum(dice);
+         }
+         return 0;
+      }
+      case FOUR_OF_A_KIND: {
+         const count_t counts = count(dice);
+         const int face_with_count_4 = has_count(counts, 4);
+         const int face_with_count_1 = has_count(counts, 1);
+         const int face_with_count_5 = has_count(counts, 5);
+         if ((face_with_count_4 && face_with_count_1) || face_with_count_5) {
+            return 4 * (face_with_count_4 + face_with_count_5);
+         }
+         return 0;
+      }
+      case LITTLE_STRAIGHT: {
+         const count_t counts = count(dice);
+         for (int face = 0; face < 5; ++face) {
+            if (counts.faces[face] != 1)
+               return 0;
+         }
+         return 30;
+      }
+      case BIG_STRAIGHT: {
+         const count_t counts = count(dice);
+         for (int face = 1; face < 6; ++face) {
+            if (counts.faces[face] != 1)
+               return 0;
+         }
+         return 30;
+      }
+      case CHOICE:
+         return sum(dice);
+      case YACHT: {
+         const count_t counts = count(dice);
+         if (has_count(counts, 5))
+            return 50;
+         return 0;
+      }
+   }
+   return 0;
+}

exercises/practice/yacht/.meta/example.h

@@ -0,0 +1,27 @@
+#ifndef YACHT_H
+#define YACHT_H
+
+#include <stdint.h>
+
+typedef enum {
+   ONES,
+   TWOS,
+   THREES,
+   FOURS,
+   FIVES,
+   SIXES,
+   FULL_HOUSE,
+   FOUR_OF_A_KIND,
+   LITTLE_STRAIGHT,
+   BIG_STRAIGHT,
+   CHOICE,
+   YACHT
+} category_t;
+
+typedef struct {
+   uint8_t faces[5];
+} dice_t;
+
+int score(dice_t dice, category_t category);
+
+#endif

exercises/practice/yacht/.meta/tests.toml

@@ -0,0 +1,97 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[3060e4a5-4063-4deb-a380-a630b43a84b6]
+description = "Yacht"
+
+[15026df2-f567-482f-b4d5-5297d57769d9]
+description = "Not Yacht"
+
+[36b6af0c-ca06-4666-97de-5d31213957a4]
+description = "Ones"
+
+[023a07c8-6c6e-44d0-bc17-efc5e1b8205a]
+description = "Ones, out of order"
+
+[7189afac-cccd-4a74-8182-1cb1f374e496]
+description = "No ones"
+
+[793c4292-dd14-49c4-9707-6d9c56cee725]
+description = "Twos"
+
+[dc41bceb-d0c5-4634-a734-c01b4233a0c6]
+description = "Fours"
+
+[f6125417-5c8a-4bca-bc5b-b4b76d0d28c8]
+description = "Yacht counted as threes"
+
+[464fc809-96ed-46e4-acb8-d44e302e9726]
+description = "Yacht of 3s counted as fives"
+
+[d054227f-3a71-4565-a684-5c7e621ec1e9]
+description = "Fives"
+
+[e8a036e0-9d21-443a-8b5f-e15a9e19a761]
+description = "Sixes"
+
+[51cb26db-6b24-49af-a9ff-12f53b252eea]
+description = "Full house two small, three big"
+
+[1822ca9d-f235-4447-b430-2e8cfc448f0c]
+description = "Full house three small, two big"
+
+[b208a3fc-db2e-4363-a936-9e9a71e69c07]
+description = "Two pair is not a full house"
+
+[b90209c3-5956-445b-8a0b-0ac8b906b1c2]
+description = "Four of a kind is not a full house"
+
+[32a3f4ee-9142-4edf-ba70-6c0f96eb4b0c]
+description = "Yacht is not a full house"
+
+[b286084d-0568-4460-844a-ba79d71d79c6]
+description = "Four of a Kind"
+
+[f25c0c90-5397-4732-9779-b1e9b5f612ca]
+description = "Yacht can be scored as Four of a Kind"
+
+[9f8ef4f0-72bb-401a-a871-cbad39c9cb08]
+description = "Full house is not Four of a Kind"
+
+[b4743c82-1eb8-4a65-98f7-33ad126905cd]
+description = "Little Straight"
+
+[7ac08422-41bf-459c-8187-a38a12d080bc]
+description = "Little Straight as Big Straight"
+
+[97bde8f7-9058-43ea-9de7-0bc3ed6d3002]
+description = "Four in order but not a little straight"
+
+[cef35ff9-9c5e-4fd2-ae95-6e4af5e95a99]
+description = "No pairs but not a little straight"
+
+[fd785ad2-c060-4e45-81c6-ea2bbb781b9d]
+description = "Minimum is 1, maximum is 5, but not a little straight"
+
+[35bd74a6-5cf6-431a-97a3-4f713663f467]
+description = "Big Straight"
+
+[87c67e1e-3e87-4f3a-a9b1-62927822b250]
+description = "Big Straight as little straight"
+
+[c1fa0a3a-40ba-4153-a42d-32bc34d2521e]
+description = "No pairs but not a big straight"
+
+[207e7300-5d10-43e5-afdd-213e3ac8827d]
+description = "Choice"
+
+[b524c0cf-32d2-4b40-8fb3-be3500f3f135]
+description = "Yacht as choice"

exercises/practice/yacht/makefile

@@ -0,0 +1,37 @@
+### If you wish to use extra libraries (math.h for instance),
+### add their flags here (-lm in our case) in the "LIBS" variable.
+
+LIBS = -lm
+
+###
+CFLAGS  = -std=c99
+CFLAGS += -g
+CFLAGS += -Wall
+CFLAGS += -Wextra
+CFLAGS += -pedantic
+CFLAGS += -Werror
+CFLAGS += -Wmissing-declarations
+CFLAGS += -DUNITY_SUPPORT_64 -DUNITY_OUTPUT_COLOR
+
+ASANFLAGS  = -fsanitize=address
+ASANFLAGS += -fno-common
+ASANFLAGS += -fno-omit-frame-pointer
+
+.PHONY: test
+test: tests.out
+	@./tests.out
+
+.PHONY: memcheck
+memcheck: ./*.c ./*.h
+	@echo Compiling $@
+	@$(CC) $(ASANFLAGS) $(CFLAGS) test-framework/unity.c ./*.c -o memcheck.out $(LIBS)
+	@./memcheck.out
+	@echo "Memory check passed"
+
+.PHONY: clean
+clean:
+	rm -rf *.o *.out *.out.dSYM
+
+tests.out: ./*.c ./*.h
+	@echo Compiling $@
+	@$(CC) $(CFLAGS) test-framework/unity.c ./*.c -o tests.out $(LIBS)