go语言指针

package main
import (
    "fmt"
)
//案例1:使用函数返回变量指针地址
func f() *int {
    x:=10;
    return &x;
}
func main() {
    var p = f();
    fmt.Println(*p);
} 

func inc( p *int ) int {
    *p++;
    return *p;
}

func main() {
    x:=10;
    var num=inc(&x);
    fmt.Println(num);
}

package main
import (
    "fmt"
    "strings"
    "flag"
)
var n = flag.Bool("n",false,"omit tralling newline");
var sep = flag.String("s"," ","separator");
func main(){
    flag.Parse();
    fmt.Println(strings.Join(flag.Args(),*sep));
    if !*n {
        fmt.Println();
    }
}