import BTL learn(1) lessons/C

1 files changed, 13 insertions, 0 deletions

diff --git a/usr.bin/learn/lib/C/getnum.c b/usr.bin/learn/lib/C/getnum.c
new file mode 100644
index 00000000000..1bb379ee75d
--- /dev/null
+++ b/usr.bin/learn/lib/C/getnum.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+getnum()
+{
+	int c, n;
+
+	n = 0;
+	while ((c=getchar()) >= '0' && c <= '9')
+		n = n*10 + c - '0';
+	if (c == EOF)
+		return(-1);
+	return(n);
+}