RPC_ArithClient.go

/*
RPC_ArithClient

RPC客户端

运行：
go run RPC_ArithClient.go 127.0.0.1
*/
package main

import (
	"fmt"
	"log"
	"net/rpc"
	"os"
)

type Args struct {
	A, B int
}

type Quotient struct {
	Quo, Rem int
}

func main() {
	if len(os.Args) != 2 {
		fmt.Println("Usage: ", os.Args[0], " server")
		os.Exit(1)
	}

	serverAddress := os.Args[1]

	client, err := rpc.DialHTTP("tcp", serverAddress+":20000")
	if err != nil {
		log.Fatal("dialing: ", err)
	}

	// 同步调用
	args := Args{17, 8}

	var reply int
	err = client.Call("Arith.Multiply", args, &reply)
	if err != nil {
		log.Fatal("arith error: ", err)
	}
	fmt.Printf("Arith: %d * %d = %d\n", args.A, args.B, reply)

	var quot Quotient
	err = client.Call("Arith.Divide", args, &quot)
	if err != nil {
		log.Fatal("arith error", err)
	}
	fmt.Printf("Arith: %d / %d = %d remainder %d\n", args.A, args.B, quot.Quo, quot.Rem)
}