refactored append and char test

main.h

@@ -4,6 +4,6 @@ int _printf(const char *format, ...);
 int _contains(const char *str, char c);
 int _strlen(const char *str);
 char *_strcpy(char *dest, char *src);
-void append(char *str, char c);
+char *append(char *str, char c);
 
 #endif

printf.c

@@ -38,7 +38,7 @@ int _printf(const char *format, ...)
 					break;
 				case 'c': /* add 1 byte and i++ */
 					c = (char) va_arg(args, int);
-					append(buffer, c);
+					buffer = append(buffer, c);
 					BUFF_SIZE += 1;
 					buff_idx += 1;
 					break;

strings.c

@@ -1,4 +1,5 @@
 #include "main.h"
+#include <stdlib.h>
 
 /**
  * _strlen - Takes string and return its length
@@ -45,9 +46,19 @@ int _contains(const char *str, char c)
  * Return: da string but appended
  */
 
-void append(char *str, char c)
+char* append(char *str, char c)
 {
-	int len = _strlen(str);
-	*(str + len) = c;
-	*(str + len + 1) = '\0';
+	int len, i;
+	char *new_me;
+
+	len = _strlen(str);
+
+	new_me = malloc(len + 1);
+	i = -1;
+	while(*(str + ++i))
+		*(new_me + i) = *(str + i);
+
+	*(new_me + i++) = c;
+	*(new_me + len + 1) = '\0';
+	return (new_me);
 }

tests/append.c

@@ -0,0 +1,17 @@
+#include "../main.h"
+#include <stdio.h>
+
+/**
+ *main - ensure append work
+ */
+int main(void)
+{
+	char *str, c;
+
+	str = "hello";
+	c = 'c';
+	str = append(str, c);
+	_printf("%s\n", str);
+	return (0);
+
+}

tests/char_print.c

@@ -10,6 +10,6 @@ int main(void)
 {
 	char c = 'c';
 
-	_printf("cat: %c", c);
+	_printf("%c\n", c);
 	return (0);
 }