golang编程之获取命令行参数及环境变量 | Bean
manu@manu-hacks:~/code/go/self$ cat sum.go
package main
import "fmt"
import "os"
import "strconv"
func main() int{
arg_num :=len(os.Args)
fmt.Printf("the num of input is %d\n",arg_num)
fmt.Printf("they are :\n")
for i := 0 ; i < arg_num ;i++{
fmt.Println(os.Args[i])
}
sum := 0
for i := 1 ; i < arg_num; i++{
curr,err:=strconv.Atoi(os.Args[i])
if(err!= nil){
fmt.Println("error happened ,exit")
return 1
}
sum += curr
}
fmt.Printf("sum of Args is %d\n",sum)
return 0}