int toupper(int c);
#include "libft.h"
int ft_toupper(int c)
{
if ('a' <= c && c <= 'z')
return (c - 32);
return (c);
}
#include <stdio.h>
//#include <ctype.h>
int main(void)
{
char ch1 = 'a';
char ch2 = 'B';
printf("%c\n", ft_toupper(ch1));
printf("%c\n", ft_toupper(ch2));
return 0;
}