Data commit

Task/Fibonacci-n-step-number-sequences/Go/fibonacci-n-step-number-sequences.go

@@ -0,0 +1,39 @@
+package main
+
+import "fmt"
+
+func g(i []int, c chan<- int) {
+	var sum int
+	b := append([]int(nil), i...) // make a copy
+	for _, t := range b {
+		c <- t
+		sum += t
+	}
+	for {
+		for j, t := range b {
+			c <- sum
+			b[j], sum = sum, sum+sum-t
+		}
+	}
+}
+
+func main() {
+	for _, s := range [...]struct {
+		seq string
+		i   []int
+	}{
+		{"Fibonacci", []int{1, 1}},
+		{"Tribonacci", []int{1, 1, 2}},
+		{"Tetranacci", []int{1, 1, 2, 4}},
+		{"Lucas", []int{2, 1}},
+	} {
+		fmt.Printf("%10s:", s.seq)
+		c := make(chan int)
+		// Note/warning: these goroutines are leaked.
+		go g(s.i, c)
+		for j := 0; j < 10; j++ {
+			fmt.Print(" ", <-c)
+		}
+		fmt.Println()
+	}
+}