谷歌協議緩衝液C++上ubutu

Question

我想使用谷歌協議緩衝在C++ Ubuntu上在第一步驟i創建通過調用.proto文件

package business; 
message Employee 
{ 
required string first_name = 1; 
required string last_name = 2; 
required string email = 3; 
} 

message Company 
{ 
required string name = 1; 
optional string url = 2; 
repeated Employee employee = 3; 
} 

我可以很容易地轉換爲C++數據訪問類：

protoc -I=. --cpp_out=. business.proto 

這一步protoc後創建到文件

business.pb.h 
business.pb.cc 

當我要編譯這段代碼我看到錯誤

#include <iostream> 
#include <fstream> 
#include "business.pb.h" 

using namespace std; 

/// Saves a demo company object to 'company.bin'. 
void save() 
{ 
    business::Company company; 
    company.set_name("Example Ltd."); 
    company.set_url("http://www.example.com"); 

    // 1st employee 
    { 
     business::Employee *employee = company.add_employee(); 
     employee->set_first_name("John"); 
     employee->set_last_name("Doe"); 
     employee->set_email("john.doe@example.com"); 
    } 

    // 2nd employee 
    { 
     business::Employee *employee = company.add_employee(); 
     employee->set_first_name("Jane"); 
     employee->set_last_name("Roe"); 
     employee->set_email("jane.roe@example.com"); 
    } 

    fstream output("company.bin", ios::out | ios::trunc | ios::binary); 
    company.SerializeToOstream(&output); 
} 

/// Loads a demo company object from 'company.bin' and dumps its data. 
void load() 
{ 
    business::Company company; 
    fstream input("company.bin", ios::in | ios::binary); 

    company.ParseFromIstream(&input); 
    cout << "Company: " << company.name() << "\n"; 
    cout << "URL: " << (company.has_url() ? company.url() : "N/A") << "\n"; 

    cout << "\nEmployees: \n\n"; 
    for(int i = 0, n = company.employee_size(); i < n; ++i) 
    { 
     const business::Employee &employee = company.employee(i); 
     cout << "First name: " << employee.first_name() << "\n"; 
     cout << "Last name: " << employee.last_name() << "\n"; 
     cout << "Email: " << employee.email() << "\n"; 
     cout << "\n"; 
    } 
} 

int main() 
{ 
    save(); 
    load(); 
    return 0; 
} 

用於編譯我用這個命令

g++ p1.cpp business.pb.cc `pkg-config --cflags --libs protobuf` 

，但我看到這個錯誤 http://i.stack.imgur.com/soQ3Z.png

Answer 1

我解決了這個問題 1）卸載舊版本的谷歌協議緩衝 2）安裝新版本谷歌協議緩衝區