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package main
import (
"bufio"
"fmt"
"os"
"strconv"
"strings"
)
func main() {
stdin := bufio.NewReader(os.Stdin)
for {
fmt.Fprint(os.Stdout, "$ ")
in, err := stdin.ReadString('\n')
if err != nil {
fmt.Println(err.Error())
}
trim := strings.TrimSpace(in)
commands := strings.Split(trim, " ")
switch commands[0] {
case "exit":
code, err := strconv.Atoi(commands[1])
if err != nil {
fmt.Println(err.Error())
}
os.Exit(code)
return
case "echo":
fmt.Println(os.Stdout, "%s\n", strings.Join(commands[1:], " "))
return
default:
fmt.Printf("%s: command not found\n", commands[0])
return
}
}
}
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