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-rw-r--r--snc.c99
1 files changed, 77 insertions, 22 deletions
diff --git a/snc.c b/snc.c
index 58aea38..3585141 100644
--- a/snc.c
+++ b/snc.c
@@ -26,7 +26,12 @@
void usage()
{
- printf("Simple numbers converter\n"
+ printf("SNC (Simple numbers converter)\n"
+ "Copyright (C) 2021 Aleksandr D. Goncharov\n"
+ "SNC is free software; you can redistribute it and/or modify\n"
+ "it under the terms of the GNU General Public License as\n"
+ "published by the Free SoftwareFoundation; either version\n"
+ "2 of the License, or (at your option) any later version.\n"
"\n"
"Synopsis: snc [OPTION] ... [NUMBER]\n"
"Option:\n"
@@ -37,14 +42,15 @@ void usage()
"\t-o, --output\n"
"\t\t****\n"
"\t-a, --alphabet\n"
- "\t\t****\n"
+ "\t\tOutput numeral system. Arabic is used by default\n"
"\t-A, --list-alphabets\n"
- "\t\t****\n");
+ "\t\tPrint valid alphabets\n");
}
int getRomanValue(char symbol)
{
- switch(symbol) {
+ switch(symbol)
+ {
case 'I': return SNC_ROMAN_I; // have triple notation
case 'V': return SNC_ROMAN_V;
case 'X': return SNC_ROMAN_X; // have triple notation
@@ -52,8 +58,8 @@ int getRomanValue(char symbol)
case 'C': return SNC_ROMAN_C; // have triple notation
case 'D': return SNC_ROMAN_D;
case 'M': return SNC_ROMAN_M; // have triple notation
+ default: return 0;
}
- return 0;
}
int romanToArabic(char *str)
@@ -66,8 +72,16 @@ int romanToArabic(char *str)
int cur_value = getRomanValue(*str);
if(cur_value == 0)
return -1;
- else if(last_value == cur_value || last_value == 0) {
+
+ if(last_value == cur_value || last_value == 0) {
+ if(amount_char >= 3)
+ return -1;
answer += cur_value;
+ if(cur_value == SNC_ROMAN_V || cur_value == SNC_ROMAN_L
+ || cur_value == SNC_ROMAN_D) {
+ if(amount_char > 1) return -1;
+ }
+
amount_char++;
}
else if(last_value > cur_value) {
@@ -75,26 +89,19 @@ int romanToArabic(char *str)
amount_char = 1;
}
else if(last_value < cur_value) {
+ if(amount_char > 1)
+ return -1;
if(last_value * 10 < cur_value)
return -1;
- else if(last_value == SNC_ROMAN_V ||
- last_value == SNC_ROMAN_L || last_value == SNC_ROMAN_D)
+ if(last_value == SNC_ROMAN_V || last_value == SNC_ROMAN_L
+ || last_value == SNC_ROMAN_D)
return -1;
-
+
answer += cur_value - 2 * last_value;
- if(amount_char > 1)
- return -1;
amount_char = 1;
}
last_value = cur_value;
- if(amount_char > 3)
- return -1;
- else if(cur_value == SNC_ROMAN_V ||
- cur_value == SNC_ROMAN_L || cur_value == SNC_ROMAN_D) {
- if(amount_char > 1) return -1;
- }
-
str++;
}
@@ -138,10 +145,15 @@ int main(int argc, char *argv[])
{"input", required_argument, NULL, 'i'},
{"output", required_argument, NULL, 'o'},
{"alphabet", required_argument, NULL, 'a'},
- {"list-alphabets", required_argument, NULL, 'A'},
+ {"list-alphabets", no_argument, NULL, 'A'},
{NULL, 0, NULL, 0}
};
+ int convert_from;
+ int convert_to = SNC_ARABIC;
+ //int input_base = 10;
+ //int output_base = 10;
+
while((result = getopt_long(argc, argv, short_options,
long_options, NULL)) != -1) {
switch(result) {
@@ -156,14 +168,57 @@ int main(int argc, char *argv[])
break;
}
case 'a': {
- break;
+ if(strcmp(optarg, "roman") == 0) {
+ convert_to = SNC_ROMAN;
+ break;
+ }
+ else if(strcmp(optarg, "arabic") == 0) {
+ convert_to = SNC_ARABIC;
+ break;
+ }
+ // else print all available alphabets
}
case 'A': {
- break;
+ printf("Valid alphabets are: roman, arabic\n");
+ return 0;
}
default: break;
}
}
+ char *str_number = argv[optind];
+ if(!str_number) {
+ usage();
+ return 1;
+ }
+
+ if(atoi(argv[optind]) == 0)
+ convert_from = SNC_ROMAN;
+ else
+ convert_from = SNC_ARABIC;
+
+ if(convert_to != convert_from) {
+ if(convert_to == SNC_ROMAN) {
+ char *answer = arabicToRoman(str_number);
+ if(!answer) {
+ printf("%s is not correct arabic number.\n", str_number);
+ return 1;
+ }
+ printf("%s\n", answer);
+ free(answer);
+ }
+ else {
+ int answer = romanToArabic(str_number);
+ if(answer == -1) {
+ printf("%s is not correct roman number.\n", str_number);
+ return 1;
+ }
+ printf("%d\n", answer);
+ }
+ }
+ else {
+ printf("%s\n", str_number);
+ }
+
return 0;
-} \ No newline at end of file
+}