```go // 实现计算一个数字的各个位数之和如：123=6 // 采用工作池方式 package main import ( "fmt" "math/rand" ) type job struct { number int id int } type result struct { job *job sum int } func main() { j := make(chan *job, 1000) r := make(chan *result, 1000) //调用消费者 workpool(128, j, r) go printResult(r) //调用生产者 producer(j) } //calc 计算函数 func calc(job *job, res chan *result) { var sum int number := job.number for number != 0 { tmp := number % 10 sum += tmp number /= 10 } r := &result{ job: job, sum: sum, } res <- r } //消费者work不断从chan管道 中获取所需参数 func work(job chan *job, res chan *result) { for j := range job { calc(j, res) } } //workpool 这里不断开启指定个数的goroutine func workpool(workNum int, job chan *job, res chan *result) { for i := 0; i < workNum; i++ { go work(job, res) } } //printResult打印结果 func printResult(result chan *result) { for r := range result { fmt.Printf("结果：id=%d,number=%d,计算结果=%d\n", r.job.id, r.job.number, r.sum) } } //producer 生成者 func producer(jobChan chan *job) { var id int = 0 for { id++ number := rand.Int() job := &job{ number: number, id: id, } jobChan <- job } } ``` 运行结果如下