{

/// serialize to bytearray

Person per;

per.set_id(5000);

per.set_number(5000);

per.set_anotherid(5000);

per.set_aid(5000);

per.set_bid(5000);

per.set_cid(5000);

per.set_did(5000);

per.set_eid(5000);

per.set_fid(5000);

per.set_gid(5000);

//per.set_name("MadamCurie");

//gper.clear_name();

//std::cout<<per.name();

endl(std::cout);

size_t size = per.ByteSizeLong();

std::cout<<"size bytes "<<size<<std::endl;

void *buffer = malloc(size);

bool flag = per.SerializeToArray(buffer, size);

if(flag == false)

std::cout<<"serialize problem"<<std::endl;

Person per3;

per3.ParseFromArray(buffer,size);

endl(std::cout);

std::cout<<"id "<<per3.id();

endl(std::cout);

std::cout<<"id "<<per3.number();

endl(std::cout);

std::cout<<"id "<<per3.anotherid();

//serialize to string

std::string str = per.SerializeAsString();

uint32_t var = 5000;

std::cout<<"var size " <<sizeof(var)*10;

endl(std::cout);

std::cout<<"serialized string size " <<str.size();

endl(std::cout);

std::cout<<"serialized string " <<str;

Person per2;

per2.ParseFromString(str);

endl(std::cout);

std::cout<<"id "<<per2.id();

endl(std::cout);

std::cout<<"id "<<per2.number();

endl(std::cout);

std::cout<<"id "<<per2.anotherid();

// file example

Person file;

file.set_number(321);

std::string filename = "test.txt";

std::fstream output(filename, std::ios::out | std::ios::trunc | std::ios::binary);

if(!file.SerializeToOstream(&output))

{

std::cout<<"failed to write a file"<<std::endl;

}

output.close();

endl(std::cout);

Person file2;

std::fstream input(filename, std::ios::in | std::ios::binary);

if (!input) {

std::cout << ": File not found." << std::endl;

}

if(!file2.ParseFromIstream(&input))

{

std::cout<<"failed to read a file"<<std::endl;

}

std::cout<<"number from file "<<file2.number()<<std::endl;

return 0;

}