echo输出

echo输出的几个例子

// ch1 project main.go
package main

import (
    "fmt"
    "os"
    "strings"
)

func main() {
    s := strings.Join(os.Args, " ")
    fmt.Println("s=", s)
    fmt.Println(strings.Join(os.Args, " "))
}

结果输出：
[root@hadoop1 ch1]# ./echo  hello world It is very good
s= ./echo hello world It is very good
./echo hello world It is very good
[root@hadoop1 ch1]#

-------------------------------------------------------------

// ch1 project main.go
package main

import (
    "fmt"
    "os"
)

func main() {
    for key, val := range os.Args {
        fmt.Printf("%v: %s\n", key, val)
    }
}

输出结果：
[root@hadoop1 ch1]# ./echo  hello world It is very good
0: ./echo
1: hello
2: world
3: It
4: is
5: very
6: good
[root@hadoop1 ch1]#