diff options
Diffstat (limited to 'ft_atoi.c')
| -rwxr-xr-x | ft_atoi.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/ft_atoi.c b/ft_atoi.c new file mode 100755 index 0000000..4633d2f --- /dev/null +++ b/ft_atoi.c @@ -0,0 +1,94 @@ +/* +Libft Copyright (C) 2026 yctct + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <https://www.gnu.org/licenses/>. +*/ + +int ft_atoi(const char *nptr) +{ + int i; + int tmp; + int nbl; + + i = 0; + nbl = 0; + while (nptr[i] == 32 || (nptr[i] >= 7 && nptr[i] <= 13)) + i++; + tmp = 1; + if (nptr[i] == '-') + { + i++; + tmp *= -1; + } + else if (nptr[i] == '+') + i++; + while (nptr[i] >= 48 && nptr[i] <= 57) + { + nbl = (nbl * 10) + nptr[i] - 48; + i++; + } + return (tmp * nbl); +} + +/* +#include <stdio.h> +#include <stdlib.h> + +int main(void) +{ + printf("for: ---+--+1234ab567\n"); + printf("ft_atoi: %i\n", ft_atoi(" --+--+1234ab567")); + printf(" atoi: %i\n", atoi(" ---+-+1234ab567")); + printf("------------------------------------\n"); + printf("for: 3\n"); + printf("ft_atoi: %i\n", ft_atoi("3")); + printf(" atoi: %i\n", atoi("3")); + printf("------------------------------------\n"); + printf("for: 0\n"); + printf("ft_atoi: %i\n", ft_atoi("0")); + printf(" atoi: %i\n", atoi("0")); + printf("------------------------------------\n"); + printf("for: -1\n"); + printf("ft_atoi: %i\n", ft_atoi("-1")); + printf(" atoi: %i\n", atoi("-1")); + printf("------------------------------------\n"); + printf("for: 2147483647\n"); + printf("ft_atoi: %i\n", ft_atoi("2147483647")); + printf(" atoi: %i\n", atoi("2147483647")); + printf("------------------------------------\n"); + printf("for: -2147483648\n"); + printf("ft_atoi: %i\n", ft_atoi("-2147483648")); + printf(" atoi: %i\n", atoi("-2147483648")); + printf("------------------------------------\n"); + printf("for: -2147483647\n"); + printf("ft_atoi: %i\n", ft_atoi("-2147483647")); + printf(" atoi: %i\n", atoi("-2147483647")); + printf("------------------------------------\n"); + printf("for: 2147483648\n"); + printf("ft_atoi: %i\n", ft_atoi("2147483648")); + printf(" atoi: %i\n", atoi("2147483648")); + printf("------------------------------------\n"); + printf("for: -+27\n"); + printf("ft_atoi: %i\n", ft_atoi("-+27")); + printf(" atoi: %i\n", atoi("-+27")); + printf("------------------------------------\n"); + printf("for: +27\n"); + printf("ft_atoi: %i\n", ft_atoi("+27")); + printf(" atoi: %i\n", atoi("+27")); + printf("------------------------------------\n"); + printf("for: #27\n"); + printf("ft_atoi: %i\n", ft_atoi("#27")); + printf(" atoi: %i\n", atoi("#27")); +} +*/ |