Created
September 4, 2024 12:31
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fib with go routines
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| package main | |
| import ( | |
| "fmt" | |
| "sync" | |
| ) | |
| var wg sync.WaitGroup | |
| func readFib(c <-chan int) { | |
| // Option 1 | |
| // for val := range c { | |
| // fmt.Println(val) | |
| // } | |
| // Option 2 | |
| for { | |
| var val int | |
| var ok bool | |
| if val, ok = <-c; !ok { | |
| break | |
| } | |
| fmt.Println(val) | |
| } | |
| } | |
| func fib(c chan<- int, n int) { | |
| fibArr := []int{1, 1} | |
| c <- fibArr[0] | |
| c <- fibArr[1] | |
| wg.Add(-2) | |
| next := 0 | |
| for i := 2; i < n; i++ { | |
| defer wg.Done() | |
| next = fibArr[i-1] + fibArr[i-2] | |
| fibArr = append(fibArr, next) | |
| c <- next | |
| } | |
| close(c) | |
| } | |
| func routineFib(n int) { | |
| wg.Add(n) | |
| ch := make(chan int, n) | |
| go fib(ch, n) | |
| readFib(ch) | |
| wg.Wait() | |
| } | |
| func main() { | |
| routineFib(10) | |
| } | |
| /* Response | |
| 1 | |
| 1 | |
| 2 | |
| 3 | |
| 5 | |
| 8 | |
| 13 | |
| 21 | |
| 34 | |
| 55 | |
| */ |
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