fix(solutions): memory issues thanks to -fsanitize=address flag with gcc

challenges/first-non-repeating-character/solutions/c/function/character.c

@@ -1,8 +1,5 @@
 #include "character.h"
 
-#include <stdlib.h>
-#include <string.h>
-
 void character_append(char* string, char character) {
   size_t length = strlen(string);
   string[length] = character;

challenges/first-non-repeating-character/solutions/c/function/character.h

@@ -1,6 +1,9 @@
 #ifndef __CHARACTER__
 #define __CHARACTER__
 
+#include <stdlib.h>
+#include <string.h>
+
 /**
  * @brief Append a character to a string, assuming string points to an array
  * with enough space.

challenges/first-non-repeating-character/solutions/c/function/input.c

@@ -1,10 +1,5 @@
 #include "input.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "character.h"
-
 char* input() {
   char character;
   size_t length = 1;

challenges/first-non-repeating-character/solutions/c/function/input.h

@@ -1,6 +1,11 @@
 #ifndef __INPUT__
 #define __INPUT__
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "character.h"
+
 /**
  * @brief Read a line from stdin.
  *

challenges/first-non-repeating-character/solutions/c/function/string.c

@@ -1,11 +1,5 @@
 #include "string.h"
 
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "character.h"
-
 size_t string_total_occurrences_of_character(char* string, char character) {
   size_t result = 0;
   size_t string_length = strlen(string);

challenges/first-non-repeating-character/solutions/c/function/string.h

@@ -1,7 +1,11 @@
 #ifndef __STRING__
 #define __STRING__
 
+#include <stdbool.h>
 #include <stdlib.h>
+#include <string.h>
+
+#include "character.h"
 
 /**
  * @brief Returns the total number of occurrences of the given character in the string.