1. 使用goroutine和channel实现一个计算int64随机数各位和的程序
- 开启一个goroutine循环生成int64类型的随机数,发送到jobChan
- 开启24个goroutine 从jobChan取出随机数并计算各位各位数的和,将结果发送到resultChan
- 主goroutine从resultChan取出结果并打印到终端输出
package main
import (
"fmt"
"math/rand"
"sync"
"time"
)
type Job struct {
value int64
}
type Result struct {
job *Job
sum int64
}
var wg sync.WaitGroup
var jobChan = make(chan *Job, 100)
var resultChan = make(chan *Result, 100)
func producer(job chan<- *Job) {
defer wg.Done()
for {
newJob := &Job{
value: rand.Int63(),
}
job <- newJob
time.Sleep(time.Microsecond * 500)
}
}
func consumer(z1 <-chan *Job, resultChan chan<- *Result) {
defer wg.Done()
for {
job1 := <-z1
result := int64(0)
n := job1.value
for n > 0 {
result += n % 10
n = n / 10
}
newResult := &Result{
job: job1,
sum: result,
}
resultChan <- newResult
}
}
func main() {
wg.Add(1)
go producer(jobChan)
wg.Add(24)
for i := 0; i < 24; i++ {
go consumer(jobChan, resultChan)
}
for result := range resultChan {
fmt.Printf("value:%d sum:%d\n",result.job.value,result.sum)
}
wg.Wait()
}
