golang 输出进度条
代码：
```go
package main
import (
"fmt"
"os"
"time"
)
func main() {
fmt.Fprintf(os.Stdout, "%d%% [正在链接 https://github.com/xmge/gonote]\r",0)
time.Sleep(1 * time.Second)
for i := 1; i <= 100; i = i + 1 {
fmt.Fprintf(os.Stdout, "%d%% [%s]\r",i,getS(i,"#") + getS(100-i," "))
time.Sleep(time.Second * 1)
}
}
func getS(n int,char string) (s string) {
for i:=1;i<=n;i++{
s+=char
}
return
}
```
效果：
关键点：`\r` [[了解\r]](https://stackoverflow.com/questions/15442292/golang-how-to-have-an-inplace-string-that-updates-at-stdout)