1 files changed, 3 insertions, 1 deletions
diff --git a/fib.awk b/fib.awk
index 654921c..0d46479 100644
--- a/fib.awk
+++ b/fib.awk
@@ -6,6 +6,8 @@
 BEGIN {
     ARGV[1] ? n = ARGV[1] : n = 0
     ARGV[2] ? OFMT = "%." ARGV[2] "g" : OFMT = "%g"
-    print (1/sqrt(5))*(0.5*(1 + sqrt(5)))^n - (1/sqrt(5))*(0.5*(1 - sqrt(5)))^n
+    C1 = 1.0/sqrt(5)
+    C2 = -1.0/sqrt(5)
+    print C1*(0.5*(1 + sqrt(5)))^n + C2*(0.5*(1 - sqrt(5)))^n
 }