bunch of changes

examples/fib.go

@@ -0,0 +1,25 @@
+//go:build ignore
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+func fib(x int) int {
+	if x < 2 {
+		return x
+	}
+	return fib(x-1) + fib(x-2)
+}
+
+var n = 35
+
+func main() {
+	if len(os.Args) > 2 {
+		n, _ = strconv.Atoi(os.Args[1])
+	}
+	fmt.Println(fib(n))
+}