1package main 2 3import ( 4 "flag" 5) 6var count = flag.Int("n", 32, "loop count") 7 8 9func fib(n int) int { 10 if n<=1 { 11 return n 12 } 13 return fib(n-1)+fib(n-2) 14} 15func main() { 16 flag.Parse() 17 fib(*count) 18} 19