now version controlled.

1 files changed, 37 insertions, 0 deletions

diff --git a/rounding.c b/rounding.c
new file mode 100644
index 0000000..db78664
--- /dev/null
+++ b/rounding.c
@@ -0,0 +1,37 @@
+#include <u.h>
+#include <libc.h>
+
+double
+roundf(double n)
+{
+	return floor(n + 0.5);
+}
+
+int
+roundi(double n)
+{
+	return n+0.5;
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: %s number\n", argv0);
+	exits("usage");
+}
+
+void
+main(int argc, char *argv[])
+{
+	double n;
+
+	ARGBEGIN{
+	default: usage();
+	}ARGEND;
+	if(argc != 1)
+		usage();
+	n = strtod(argv[0], nil);
+	print("%g\n", roundf(n));
+	print("%d\n", roundi(n));
+	exits(0);
+}