Commit 6305a37efcce45ee29f7c618c2ac304ab0e370c8 - GRUtils

Improvements to expseq help text Getty Ritter 12 years ago

1 changed file(s) with 21 addition(s) and 11 deletion(s). Collapse all Expand all

+21

-11

expseq/expseq.c less more

2	2	#include <stdio.h>
3	3	#include <stdlib.h>
4	4
	5	#define HELPMSG "USAGE: expseq LAST\n or: expseq FIRST LAST\n or: expseq --help\n"\
	6	"Print numbers 2^FIRST to 2^LAST in exponential steps.\n\n"\
	7	"If FIRST is omitted, it defaults to 0.\n"
	8
5	9	int main(int argc, char* argv[])
6	10	{
7		int fstnum = 0, lstnum;
	11	int fstnum = 0, lstnum, i;
8	12	if (argc == 2) {
9		char* endptr = argv[1];
10		lstnum = strtol(argv[1], &endptr, 10);
11		if (!endptr) {
12		fprintf(stderr, "%s: non-numeric arg: %s\n", argv[0], argv[1]);
13		return 0;
14		}
	13	if (strcmp(argv[1], "--help")==0
	14	\|\| strcmp(argv[1], "-h")==0) {
	15	fprintf(stderr, HELPMSG);
	16	return 1;
	17	} else {
	18	char* endptr = argv[1];
	19	lstnum = strtol(argv[1], &endptr, 10);
	20	if (!endptr) {
	21	fprintf(stderr, "%s: non-numeric arg: %s\n", argv[0], argv[1]);
	22	return 1;
	23	}
	24	}
15	25	} else if (argc == 3) {
16	26	char* endptr = argv[1];
17	27	fstnum = strtol(argv[1], &endptr, 10);
18	28	if (!endptr) {
19	29	fprintf(stderr, "%s: non-numeric arg: %s\n", argv[0], argv[1]);
20		return 0;
	30	return 1;
21	31	}
22	32	endptr = argv[2];
23	33	lstnum = strtol(argv[2], &endptr, 10);
24	34	if (!endptr) {
25	35	fprintf(stderr, "%s: non-numeric arg: %s\n", argv[0], argv[2]);
26		return 0;
	36	return 1;
27	37	}
28	38	} else {
29	39	fprintf(stderr, "%s: missing operand\n", argv[0]);
30		return 0;
	40	return 1;
31	41	}
32		i~~nt i~~ = fstnum;
	42	i = fstnum;
33	43	while (i <= lstnum) {
34	44	printf("%d\n", (int) pow(2, (float) i));
35	45	i++;