From 9a6959b2700ec54392fb2ffb145bacae66fc2269 Mon Sep 17 00:00:00 2001
From: Jacob McDonnell <jacob@simplelittledream.com>
Date: Wed, 18 Aug 2021 17:31:19 -0400
Subject: initial commit

---
 rng/src/rng.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 rng/src/rng.c

(limited to 'rng/src/rng.c')

diff --git a/rng/src/rng.c b/rng/src/rng.c
new file mode 100644
index 0000000..4243268
--- /dev/null
+++ b/rng/src/rng.c
@@ -0,0 +1,52 @@
+#include <tice.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define EnterKey 5
+#define maxline 22
+#define ExitKey 9
+#define ExitCode -1
+
+int rng(int min, int max);
+int getInput(void);
+
+int main(void)
+{
+	while (true) {
+		os_ClrHome();
+
+		int min, max;
+		printf("Random Number\nPress Clear to exit\nMinimun: ");
+		if ((min = getInput()) == ExitCode)
+			break;
+		printf("\nMaximum: ");
+		if ((max = getInput()) == ExitCode)
+			break;
+		printf("\n%d", rng(min, max));
+
+		while (!os_GetCSC());
+	}
+}
+
+int getInput(void)
+{
+	char number[maxline];
+	char *ptr;
+	int16_t key, i = 0, output;
+	while((key = os_GetKey()) != EnterKey) {
+		if(key == ExitKey)
+			return ExitCode;
+		number[i] = (key - 142) + '0';
+		printf("%c", number[i++]);
+	}
+	output = strtol(number, &ptr, 10);
+	return output;
+}
+
+int rng(int min, int max)
+{
+	time_t t;
+	srand((unsigned) time(&t));
+	return (rand() % (max - min)) + min;
+}
-- 
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