packagemain
import"fmt"
import"os"
import"strconv"
funcmain()int{
arg_num:=len(os.Args)
fmt.Printf("thenumofinputis%d\n",arg_num)
fmt.Printf("theyare:\n")
fori:=0;i<arg_num;i++{
fmt.Println(os.Args[i])
}
sum:=0
fori:=1;i<arg_num;i++{
curr,err:=strconv.Atoi(os.Args[i])
if(err!=nil){
fmt.Println("errorhappened,exit")
return1
}
sum+=curr
}
fmt.Printf("sumofArgsis%d\n",sum)
return0
}
manu@manu-hacks:~/code/go/self$./sum124 thenumofinputis4 theyare: ./sum 1 2 4 sumofArgsis7 manu@manu-hacks:~/code/go/self$./sum124f5 thenumofinputis6 theyare: ./sum 1 2 4 f 5 errorhappened,exit
获取系统环境变量
packagemain
import"fmt"
import"os"
funcmain(){
environ:=os.Environ()
fori:=rangeenviron{
fmt.Println(environ[i])
}
fmt.Println("------------------------------------------------------------\n")
logname:=os.Getenv("LOGNAME")
fmt.Printf("lognameis%s\n",logname)
}
manu@manu-hacks:~/code/go/self$gorunenv.go SSH_AGENT_PID=2331 GPG_AGENT_INFO=/tmp/keyring-5CkALe/gpg:0:1 TERM=xterm SHELL=/bin/bash 。。。 ------------------------------------------------------------ lognameismanu原文链接：https://www.f2er.com/go/190252.html
