AfanasevGad7

commit 7d3531f6c7a304270489d67170110f439c60a7a8
parent a7f23a61c5defbd23d8231dcd3c41ab1c1c39dd3
Author: Plat <plat@stellar-nexus.ru>
Date:   Wed,  5 Nov 2025 22:22:04 +0000

Attempt numero 3

Diffstat:
A
libutil/estrtod.c
 | 
18
++++++++++++++++++
M
rb.c
 | 
22
++++++++--------------
M
util.h
 | 
2
++

3 files changed, 28 insertions(+), 14 deletions(-)
diff --git a/libutil/estrtod.c b/libutil/estrtod.c
@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../util.h"
+
+double
+estrtod(const char *s)
+{
+	char *end;
+	double d;
+
+	d = strtod(s, &end);
+	if (end == s || *end != '\0')
+		eprintf("%s: not a real number\n", s);
+	return d;
+}
diff --git a/rb.c b/rb.c
@@ -91,18 +91,17 @@ search(Node *root, int val)
 }
 
 int
-main(void)
+main(int argc, char *argv)
 {
+	argv0 = argv[0];
+	if (argc != 3)
+		usage();
+	unsigned int data_limit = estrtod(argv[1]);
+
 	Node *root = NULL;
 
-	int data_limit;
-	printf("Element count: ");
-	if (!scanf("%d", &data_limit)) /* scanf sucks ass */
-		eprintf("scanf:");
-	if (data_limit <= 0)
-		eprintf("scanf sucks ass");
 
-	for (int k = 1; k <= data_limit; ++k) {
+	for (unsigned int k = 1; k <= data_limit; ++k) {
 		root = add(root, k);
 		SET_COLOR(root, BLACK);
 	}
@@ -111,12 +110,7 @@ main(void)
 	for (search_value = attempt = 0; search_value < 1 || search_value > data_limit; ++attempt) {
 		if (attempt)
 			printf("Impossible value\n");
-		printf("Value: ");
-		if (!scanf("%d", &search_value)) /* scanf sucks ass */
-			eprintf("scanf:");
-		if (search_value <= 0)
-			eprintf("scanf sucks ass");
-
+		search_value = estrtod(argv[2]);
 	}
 
 	Node *s = search(root, search_value);
diff --git a/util.h b/util.h
@@ -20,3 +20,5 @@ char *estrdup(const char *);
 void enprintf(int, const char *, ...);
 void eprintf(const char *, ...);
 void weprintf(const char *, ...);
+
+double estrtod(const char *);