gofib

1 files changed, 41 insertions, 0 deletions

diff --git a/entries/vivkpatl/gofib.go b/entries/vivkpatl/gofib.go
new file mode 100644
index 0000000..293beaf
--- /dev/null
+++ b/entries/vivkpatl/gofib.go
@@ -0,0 +1,41 @@
+package main
+
+import (
+    "fmt"
+)
+
+func main() {
+    var n int
+
+    fmt.Printf("Gimme an int: ")
+
+    _, err := fmt.Scanf("%d", &n)
+    if err != nil {
+        panic(err)
+    }
+
+    if n <= 0 {
+        panic("n must be greater than 0!") 
+    }
+
+    cache := make([]int, n + 1)
+    for i := 0; i <= n; i++ {
+	cache[i] = -1;
+    }
+
+    fmt.Printf("fib(%d) = %d\n", n, fib(n, cache))
+}
+
+func fib(n int, cache []int) int {
+    if n < 2 {
+	return n
+    }
+
+    if (cache[n] != -1) {
+	return cache[n]
+    }
+
+    cache[n] = fib(n - 1, cache) + fib(n - 2, cache)
+
+    return cache[n]
+}