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troll.c - rpgtools - various tools for role-playing games
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troll.c (782B)
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1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <err.h>
4 #include <math.h>
5
6 char *argv0;
7
8 void
9 usage(void)
10 {
11 errx(1, "usage: %s DICE\nwhere DICE is N dice with M sides, in f…
12 }
13
14 int
15 random_number(int min, int max)
16 {
17 return min + round((double)rand() / RAND_MAX * (double)(max - mi…
18 }
19
20 int
21 main(int argc, char *argv[])
22 {
23 int i, n, sides, roll, sum = 0;
24
25 argv0 = *argv;
26 if (argc != 2)
27 usage();
28
29 sscanf(argv[1], "%dd%d", &n, &sides);
30
31 if (n < 1)
32 errx(1, "number of dice must be a positive value (%d)", …
33
34 if (sides < 2)
35 errx(1, "dice must be at least two sided (%d)", sides);
36
37 for (i = 0; i < n; i++) {
38 roll = random_number(1, sides);
39 printf("1d%d\t%d\n", sides, roll);
40 sum += roll;
41 }
42
43 if (n > 1)
44 printf("SUM:\t%d\n", sum);
45
46 return 0;
47 }
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