[Hacker Rank]: Warmup: Plus Minus. Better memory management.

src/lib/exercises/include/exercises/hackerrank/warmup/plus_minus.h

@@ -8,6 +8,7 @@ const int HACKERRANK_WARMUP_PLUSMINUS_LIMIT_ANSWERS = 3;
 
 char **HACKERRANK_WARMUP_plusMinusCalculate(int arr_count, const int *arr);
 void HACKERRANK_WARMUP_plusMinus(int arr_count, const int *arr);
+void HACKERRANK_WARMUP_freePlusMinus(char **plusMinusAnswer, int n);
 
 #ifdef __cplusplus
 } // extern "C"

src/lib/exercises/src/hackerrank/warmup/plus_minus.c

@@ -54,13 +54,20 @@ char **HACKERRANK_WARMUP_plusMinusCalculate(int arr_count, const int *arr) {
   return answer;
 }
 
+void HACKERRANK_WARMUP_freePlusMinus(char **plusMinusAnswer, int n) {
+  for (int i = 0; i < n; i++) {
+    free(plusMinusAnswer[i]);
+  }
+  free(plusMinusAnswer);
+}
+
 void HACKERRANK_WARMUP_plusMinus(int arr_count, const int *arr) {
   char **output = HACKERRANK_WARMUP_plusMinusCalculate(arr_count, arr);
 
   for (int i = 0; i < HACKERRANK_WARMUP_PLUSMINUS_LIMIT_ANSWERS; i++) {
     printf("%s", output[i]);
-    free(output[i]);
   }
 
-  free(output);
+  HACKERRANK_WARMUP_freePlusMinus(output,
+                                  HACKERRANK_WARMUP_PLUSMINUS_LIMIT_ANSWERS);
 }

src/tests/unit/lib/hackerrank/warmup/plus_minus.test.cpp

@@ -32,9 +32,9 @@ TEST_CASE("plusMinus JSON Test Cases", "[hackerrank] [jsontestcase] [warmup]") {
 
     for (int i = 0; i < HACKERRANK_WARMUP_PLUSMINUS_LIMIT_ANSWERS; i++) {
       result_as_vector.emplace_back(result[i]);
-      free(result[i]);
     }
-    free(result);
+    HACKERRANK_WARMUP_freePlusMinus(result,
+                                    HACKERRANK_WARMUP_PLUSMINUS_LIMIT_ANSWERS);
 
     CHECK(result_as_vector == testcase["expected"]);