func main() {
flag.Parse()
cli.RequireArgs(2, "You must provide 2 distinct numbers as arguments to the program")
args := cli.IntsArgs()
fmt.Println("Greatest common divisor is", Gcd(args[0], args[1]))
}
func main() {
alg := cli.AlgorithmFlag(availableAlgs, "eratosphen_sieve")
args := cli.IntsArgs()
f := availableAlgs[alg]
fmt.Println("Algorithm:", alg)
f(args)
}
func main() {
alg := cli.AlgorithmFlag(availableAlgs, "merge")
cli.RequireSortingArgs()
list := cli.IntsArgs()
f := availableAlgs[alg]
f(list)
fmt.Println("Algorithm:", alg)
fmt.Println("Sorted list:", list)
}