1, 下载compiler和源代码，或直接下bin包
http://code.google.com/p/protobuf/downloads/
build
protobuf:
C++代码 
- ./configure
- make
- make check
- make install
2, 创建一个addressbook.proto
C++代码
- package tutorial;
- message Person {
- required string name = 1;
- required int32 id = 2;
- optional string email = 3;
- enum PhoneType {
- MOBILE = 0;
- HOME = 1;
- WORK = 2;
- }
- message PhoneNumber {
- required string number = 1;
- optional PhoneType type = 2 [default = HOME];
- }
- repeated PhoneNumber phone = 4;
- }
- message AddressBook {
- repeated Person person = 1;
- }
3, 生成C++的stub
C++代码
- protoc --cpp_out=. ./addressbook.proto
运行上面的命令将生成addressbook.pb.h和addressbook.pb.cc
4, 成员访问代码
部分.h代码及注释：
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// name inline
bool
has_name() const; //字段是否存在，主要用于协议兼容等
inline
void
clear_name();
inline
const
::std::string& name() const;
inline
void
set_name(const
::std::string& value);
inline
void
set_name(const
char* value);
inline
::std::string* mutable_name(); //如为空，则new a buffer并返回之。
// id
inline
bool
has_id() const;
inline
void
clear_id();
inline
int32_t id() const;
inline
void
set_id(int32_t value);
// email
inline
bool
has_email() const;
inline
void
clear_email();
inline
const
::std::string& email() const;
inline
void
set_email(const
::std::string& value);
inline
void
set_email(const
char* value);
inline
::std::string* mutable_email();
// phone
inline
int
phone_size() const; //repeated 字段的数量
inline
void
clear_phone();
inline
const
::google::protobuf::RepeatedPtrField< ::tutorial::Person_PhoneNumber >& phone() const;
inline
::google::protobuf::RepeatedPtrField< ::tutorial::Person_PhoneNumber >* mutable_phone();
inline
const
::tutorial::Person_PhoneNumber& phone(int
index) const; //访问第index个字段
inline
::tutorial::Person_PhoneNumber* mutable_phone(int
index);
inline
::tutorial::Person_PhoneNumber* add_phone();
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5, 用法
就不说了吧，见上方.h代码段及注释，比什么例子要清楚多了。