R center appl.

cpop.go

package main

import (
	"fmt"
	"os"
)

func cracklePop(n int) string {
	if n%3 == 0 && n%5 == 0 {
		return "CracklePop"
	} else if n%3 == 0 {
		return "Crackle"
	} else if n%5 == 0 {
		return "Pop"
	}
	return fmt.Sprintf("%d", n)
}

func main() {
	if len(os.Args) > 1 && os.Args[1] == "--test" {
		runTests()
		return
	}

	for i := 1; i <= 100; i++ {
		fmt.Println(cracklePop(i))
	}
}

// I am doing this because I wanted to keep the tests within the same file
func runTests() {
	tests := []struct {
		input int
		want  string
	}{
		{1, "1"},
		{3, "Crackle"},
		{5, "Pop"},
		{15, "CracklePop"},
		{30, "CracklePop"},
		{33, "Crackle"},
		{50, "Pop"},
		{100, "Pop"},
	}

	passed := 0
	for _, tt := range tests {
		got := cracklePop(tt.input)
		if got != tt.want {
			fmt.Printf("FAIL: cracklePop(%d) = %q; want %q\n", tt.input, got, tt.want)
		} else {
			passed++
		}
	}

	fmt.Printf("%d/%d tests passed\n", passed, len(tests))
}