继上一篇的protobuf问题

如果一端更新了协议，那么另一端接收到消息还能解析吗？
emmm…，那么动手试试。

一、不仅增加了字段，而且还更改了原有字段顺序

#include 
#include 
#include "Old.pb.h"
#include "New.pb.h"
using namespace std;

int main()
{
//new proto
/*
	syntax = "proto2";
	package My;
	message Test
	{
		required int32 first  = 1;
		optional int32 second = 2;
		optional string fourth = 3;	
		optional int32 third  = 4;
	}
*/
	res = accept();
	My::Test st;
	st.set_first(10);
	st.set_second(20);
	st.set_third(30);
	st.set_fourth(40);
	
	string str;
	if(!st.SerializeToString(&str))
		cout<<"Serlialize Error"<

//old proto
/*
	syntax = "proto2";
	package My;
	message Test
	{
		required int32 first  = 1;
		optional int32 second = 2;
		optional int32  third = 3;
	}
	
*/
char buffer[64] = {0};
recv(sockfd,buffer,64,0);

My::Test st;
if(st.ParseFromString(buffer))
	cout<

二、增加字段，不修改原有字段顺序

//new proto
/*
	syntax = "proto2";
	package My;
	message Test
	{
		required int32 first  = 1;
		optional int32 second = 2;
		optional int32 third  = 3;	
		optional int32 fourth = 4;
	}
*/	
	My::Test st;
	st.set_first(10);
	st.set_second(20);
	st.set_third(30);
	st.set_fourth(40);
	
	string str;
	if(!st.SerializeToString(&str))
		cout<<"Serlialize Error"<