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c_basic_exo
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24
ex0/ft_putchar.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_putchar.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 22:37:40 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:36 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_putchar(char c)
{
write(1, &c, 1);
}
// int main(void)
// {
// ft_putchar('c');
// return (0);
// }

33
ex1/ft_print_alphabet.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_print_alphabet.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 22:42:06 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:29 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_putchar(char c)
{
write(1, &c, 1);
}
void ft_print_alphabet(void)
{
int i;
i = 97;
while (i <= 122)
ft_putchar(i++);
}
// int main(void)
// {
// ft_print_alphabet();
// return (0);
// }

33
ex10/ft_strlowcase.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strlowcase.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:26:17 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:30:43 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
char *ft_strlowcase(char *str)
{
int i;
i = 0;
while (str[i])
{
if (str[i] >= 'A' && str[i] <= 'Z')
str[i] += 32;
i++;
}
return (str);
}
// #include <stdio.h>
// int main(void)
// {
// char str[] = "HelLLo212FFFFFff @#@#";
// printf("%s", ft_strlowcase(str));
// }

37
ex11/ft_strcpy.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strcpy.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:31:17 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:38:22 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
char *ft_strcpy(char *dest, char *src)
{
int i;
i = 0;
while (src[i])
{
dest[i] = src[i];
i++;
}
dest[i] = '\0';
return (dest);
}
// #include <stdio.h>
// int main(void)
// {
// char src[] = "hello";
// char dest[10];
// ft_strcpy(dest, src);
// printf("%s", dest);
// return (0);
// }

27
ex12/ft_ft.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_ft.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:38:58 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:40:37 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
void ft_ft(int *nbr)
{
*nbr = 42;
}
// #include <stdio.h>
// int main(void)
// {
// int nb;
// ft_ft(&nb);
// printf("%d\n", nb);
// return (0);
// }

32
ex13/ft_swap.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_swap.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:41:12 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:43:40 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
void ft_swap(int *a, int *b)
{
int tmp;
tmp = *b;
*b = *a;
*a = tmp;
}
// #include <stdio.h>
// int main(void)
// {
// int a = 10;
// int b = 20;
// ft_swap(&a, &b);
// printf("a = %d, b = %d\n", a, b);
// return (0);
// }

54
ex14/ft_foreach.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_foreach.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:44:08 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:48:29 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
void ft_foreach(int *tab, int length, void (*f)(int))
{
int i;
i = 0;
while (i < length)
{
f(tab[i]);
i++;
}
}
// #include <unistd.h>
// void ft_putchar(char c)
// {
// write(1, &c, 1);
// }
// void ft_putnbr(int nb)
// {
// if (nb == -2147483648)
// {
// write(1, "-2147483648", 11);
// return ;
// }
// if (nb < 0)
// {
// ft_putchar('-');
// nb = -nb;
// }
// if (nb > 9)
// ft_putnbr(nb / 10);
// ft_putchar(nb % 10 + '0');
// }
// int main(void)
// {
// int tab[] = {1,2,3,4};
// ft_foreach(tab, 4, &ft_putnbr);
// return (0);
// }

41
ex15/ft_print_param.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_print_param.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:49:03 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:52:50 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_putchar(char c)
{
write(1, &c, 1);
}
void ft_putstr(char *str)
{
int i;
i = 0;
while (str[i])
ft_putchar(str[i++]);
}
int main(int ac, char **av)
{
int i;
i = 1;
(void)ac;
while (av[i])
{
ft_putstr(av[i++]);
ft_putchar('\n');
}
return (0);
}

32
ex16/ft_main_printf.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_main_printf.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:56:29 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:59:22 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdio.h>
int mul2(int nb){return (nb * 2);}
char upper(char c){return (c - 32);}
char *add1(char str[]){int i = 0; while(str[i]){if (str[i] != 32){str[i] += 1;} i++;} return str;}
char *rm1(char str[]){int i = 0; while(str[i]){if (str[i] != 32){str[i] -= 1;} i++;} return str;}
int main(void)
{
int nb = '*';
char c = 99;
char e = 33;
char str[] = "Gdkkn vnqkc";
char str2[] = "(ftu";
char d = 34;
int nbr = 43;
char str3[] = "Gdkqwe weqss !";
char str4[] = "*fweeu";
printf("%s %c %c%s %d\n", add1(str), e, c, rm1(str2), nb);
return (0);
}

27
ex2/ft_is_negative.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_is_negative.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 22:48:11 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:21 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_is_negative(int n)
{
if (n < 0)
write(1, "N", 1);
else
write(1, "P", 1);
}
// int main(void)
// {
// ft_is_negative(-1);
// return (0);
// }

32
ex3/ft_iterative_power.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_iterative_power.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 22:53:07 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:14 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
int ft_iterative_power(int nb, int power)
{
int res;
if (power < 0)
return (0);
if (power == 0 || nb == 0)
return (1);
res = nb;
while (power-- > 1)
res *= nb;
return (res);
}
// #include <stdio.h>
// int main(void)
// {
// printf("%d\n", ft_iterative_power(5, 5));
// return (0);
// }

29
ex4/ft_recursive_power.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_recursive_power.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 22:59:09 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:08 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
int ft_recursive_power(int nb, int power)
{
if (power < 0)
return (0);
else if (power == 0 || nb == 0)
return (1);
if (power != 1)
return (nb * ft_recursive_power(nb, power - 1));
return (nb);
}
// #include <stdio.h>
// int main(void)
// {
// printf("%d\n", ft_recursive_power(5, 2));
// return (0);
// }

41
ex5/ft_putnbr.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_putnbr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:03:38 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:12:01 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_putchar(char c)
{
write(1, &c, 1);
}
void ft_putnbr(int nb)
{
if (nb == -2147483648)
{
write(1, "-2147483648", 11);
return ;
}
if (nb < 0)
{
ft_putchar('-');
nb = -nb;
}
if (nb > 9)
ft_putnbr(nb / 10);
ft_putchar(nb % 10 + '0');
}
// int main(void)
// {
// ft_putnbr(21474);
// return (0);
// }

33
ex6/ft_putstr.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_putstr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:09:29 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:13:21 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
void ft_putchar(char c)
{
write(1, &c, 1);
}
void ft_putstr(char *str)
{
int i;
i = 0;
while (str[i])
ft_putchar(str[i++]);
}
int main(void)
{
ft_putstr("");
return (0);
}

28
ex7/ft_strlen.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strlen.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:13:42 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:15:58 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
int ft_strlen(char *str)
{
int i;
i = 0;
while (str[i])
i++;
return (i);
}
// #include <stdio.h>
// int main(void)
// {
// printf("%d", ft_strlen("1234567890"));
// return (0);
// }

35
ex8/ft_str_is_alpha.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_str_is_alpha.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:16:47 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:21:38 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
int ft_str_is_alpha(char *str)
{
int i;
i = 0;
while (str[i])
{
if ((str[i] >= 'a' && str[i] <= 'z')
|| (str[i] >= 'A' && str[i] <= 'Z'))
i++;
else
return (0);
}
return (1);
}
// #include <stdio.h>
// int main(void)
// {
// printf("%d", ft_str_is_alpha("sd1asd"));
// return (0);
// }

35
ex9/ft_str_is_printable.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_str_is_printable.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sgongas <sgongas@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2026/02/22 23:22:09 by sgongas #+# #+# */
/* Updated: 2026/02/22 23:25:39 by sgongas ### ########.fr */
/* */
/* ************************************************************************** */
int ft_str_is_printable(char *str)
{
int i;
i = 0;
while (str[i])
{
if (str[i] >= 32 && str[i] <= 126)
i++;
else
return (0);
}
return (1);
}
// #include <stdio.h>
// int main(void)
// {
// printf("%d", ft_str_is_printable("test"));
// return (0);
// }
// "\x01"