From 00c20ccd7f5562464186701f74a7f23d463827f9 Mon Sep 17 00:00:00 2001
From: Chris Cromer <chris@cromer.cl>
Date: Mon, 19 Nov 2018 14:56:15 -0300
Subject: [PATCH] add help argument

---
 src/sort.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/sort.c b/src/sort.c
index 418430e..fdb8e04 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -57,6 +57,7 @@ void print_usage() {
 	fprintf(stdout, "                             elementos a ordenar, sin esta opción los\n");
 	fprintf(stdout, "                             valores son elegido por el programa al azar\n");
 	fprintf(stdout, "  -i, --imprimir             imprimir el array antes y despues de ordenar\n");
+	fprintf(stdout, "  -h, --help                 mostrar como usar el programa\n");
 	fprintf(stdout, "  -v, --version              mostrar la versión del programa\n");
 }
 
@@ -197,6 +198,7 @@ int main (int argc, char **argv) {
 		{"n",			required_argument,	0,	'n'},
 		{"elegir",		no_argument,		0,	'e'},
 		{"imprimir",	no_argument,		0,	'i'},
+		{"help",		no_argument,		0,  'h'},
 		{"version",		no_argument,		0,	'v'},
 		{0, 0, 0, 0}
 	};
@@ -206,7 +208,7 @@ int main (int argc, char **argv) {
 		return 0;
 	}
 
-	while ((opt = getopt_long(argc, argv, "amqbBcsn:eiv", long_options, &long_index)) != -1) {
+	while ((opt = getopt_long(argc, argv, "amqbBcsn:eihv", long_options, &long_index)) != -1) {
 		switch (opt) {
 			case 'a':
 				merge = 1;
@@ -281,6 +283,9 @@ int main (int argc, char **argv) {
 			case 'i':
 				imprimir = 1;
 				break;
+			case 'h':
+				print_usage();
+				return 0;
 			case 'v':
 				printf("sort versión: %s\n", SORT_VERSION);
 				return 0;