bowling_kata.go

package main

import (
	"fmt"
)

func sum(nums []int) int {
	s := 0
	for _, n := range nums {
		s += n
	}
	return s
}

func score(line []int) int {
	result := 0

	// first 9 frames
	for i := 1; i <= 9; i++ {
		// strike
		if line[0] == 10 {
			result += sum(line[:3])
			line = line[1:]
			continue
		}
		// spare
		if line[0]+line[1] == 10 {
			result += sum(line[:3])
			line = line[2:]
			continue
		}
		// normal
		result += sum(line[:2])
		line = line[2:]
	}

	// last frame
	result += sum(line)

	return result
}

func main() {
	fmt.Println(score([]int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10}))
	fmt.Println(score([]int{9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0}))
	fmt.Println(score([]int{5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5}))
}