From b0ff101f2d97cff3ce77af9cc68f55e2bf50e4f5 Mon Sep 17 00:00:00 2001 From: Joursoir Date: Sat, 6 Feb 2021 13:10:05 +0000 Subject: add arabic to roman converter --- snc.c | 25 +++++++++++++++++++++++++ snc.h | 4 +++- 2 files changed, 28 insertions(+), 1 deletion(-) diff --git a/snc.c b/snc.c index d42dce2..818bc78 100644 --- a/snc.c +++ b/snc.c @@ -18,6 +18,8 @@ ***/ #include +#include +#include #include "snc.h" @@ -80,6 +82,29 @@ int romanToArabic(char *str) return answer; } +char *arabicToRoman(char *str) +{ + int number = atoi(str); + if(!number || number > SNC_ROMAN_MAX_NUMBER) + return NULL; + + const char *units[] = {"","I","II","III","IV", + "V","VI","VII","VIII","IV"}; + const char *tens[] = {"","X","XX","XXX","XL", + "L","LX","LXX","LXXX","XC"}; + const char *hundreds[] = {"","C","CC","CCC","CD", + "D","DC","DCC","DCCC","CM"}; + const char *thousands[] = {"","M","MM","MMM"}; + char *answer = malloc(sizeof(char) * (SNC_ROMAN_MAXLEN + 1)); + + strcpy(answer, thousands[number / 1000]); + strcat(answer, hundreds[number / 100 % 10]); + strcat(answer, tens[number / 10 % 10]); + strcat(answer, units[number % 10]); + + return answer; +} + int main(int argc, char *argv[]) { if(argc < 2) diff --git a/snc.h b/snc.h index b100151..9b02b51 100644 --- a/snc.h +++ b/snc.h @@ -27,7 +27,9 @@ enum { SNC_ROMAN_L = 50, SNC_ROMAN_C = 100, SNC_ROMAN_D = 500, - SNC_ROMAN_M = 1000 + SNC_ROMAN_M = 1000, + SNC_ROMAN_MAX_NUMBER = 3999, + SNC_ROMAN_MAXLEN = 15 // MMMDCCCLXXXVIII }; #endif /* SNC_NUMBERS_H */ -- cgit v1.2.3-18-g5258