compile protobuf client code on ubuntu, but include file is not found

问题

I just installed google protocol buffer on my ubuntu1604:

sudo apt install protobuf-compiler

And tried a quick test, 1 proto file, 1 cpp file to use it, try to see the encode/decode results:

$ cat 1.proto
package x;
message my{
required string name=1;
required int32 id=2;
optional string email=3;
}

$ cat 1.cpp
#include"1.pb.cc"
#include<string>
#include<iostream>
using namespace std;
using namespace x;
int main()
{
  my p;
  p.set_name("tom");
  p.set_id(18);
  p.set_email("aa@bb.com");
  string s;
  my.SerializeToString(&s);
  return 0;
}

I tried to compile it, failed to find include files:

protoc 1.proto --cpp_out=./
g++ 1.cpp 1.pb.cc -lprotobuf

In file included from 1.pb.cc:5:0,
             from 1.cpp:1:
1.pb.h:9:42: fatal error: google/protobuf/stubs/common.h: No such file or directory
compilation terminated.
In file included from 1.pb.cc:5:0:
1.pb.h:9:42: fatal error: google/protobuf/stubs/common.h: No such file or directory
compilation terminated.