Output function take const!

inc/libft.h

@@ -52,10 +52,10 @@ char	**ft_split(char const *s, char c);
 char	*ft_itoa(int n);
 char	*ft_strmapi(char const *s, char (*f)(unsigned int, char));
 void	ft_striteri(char *s, void (*f)(unsigned int, char*));
-void	ft_putchar_fd(char c, int fd);
+void	ft_putchar_fd(const char c, int fd);
-void	ft_putstr_fd(char *s, int fd);
+void	ft_putstr_fd(const char *s, int fd);
-void	ft_putendl_fd(char *s, int fd);
+void	ft_putendl_fd(const char *s, int fd);
-void	ft_putnbr_fd(int n, int fd);
+void	ft_putnbr_fd(const int n, int fd);
 
 /*
  *  Lists

src/output/ft_putchar_fd.c

@@ -13,7 +13,7 @@
 #include <unistd.h>
 #include "libft.h"
 
-void	ft_putchar_fd(char c, int fd)
+void	ft_putchar_fd(const char c, int fd)
 {
 	if (fd < 0)
 		return ;

src/output/ft_putendl_fd.c

@@ -13,7 +13,7 @@
 #include <unistd.h>
 #include "libft.h"
 
-void	ft_putendl_fd(char *s, int fd)
+void	ft_putendl_fd(const char *s, int fd)
 {
 	if (fd < 0 || s == NULL)
 		return ;

src/output/ft_putnbr_fd.c

@@ -13,7 +13,7 @@
 #include <unistd.h>
 #include "libft.h"
 
-void	ft_putnbr_fd(int n, int fd)
+void	ft_putnbr_fd(const int n, int fd)
 {
 	long	ln;
 	long	divider;

src/output/ft_putstr_fd.c

@@ -13,7 +13,7 @@
 #include <unistd.h>
 #include "libft.h"
 
-void	ft_putstr_fd(char *s, int fd)
+void	ft_putstr_fd(const char *s, int fd)
 {
 	size_t	length;