Google ProtoBuf C++ Example

Posted on May 12, 2018 by admin

SerializeToString & SerializeToArray

```
syntax = "proto3";
```
```
 
```
```
package test;
```
```
 
```
```
message People {
```
```
  string name = 1;
```
```
  int32 age = 2;
```
```
  int32 steps = 3;
```
```
}
```

protoc Usage :

water@waters-MacBook-Pro:~/Documents/GitHub/CppQt5/TestProtobuf$ protoc --cpp_out=. people.proto

water@waters-MacBook-Pro:~/Documents/GitHub/CppQt5/TestProtobuf$ ls people.p*

```
people.pb.cc people.pb.h  people.proto
```

```
#include <iostream>
```
```
 
```
```
#include "people.pb.h"
```
```
 
```
```
int main(int argc, char *argv[])
```
```
{
```
```
    test::People pep;
```
```
    pep.set_name("heheda");
```
```
    pep.set_age(5);
```
```
    pep.set_steps(1304);
```
```
 
```
```
    std::string buff;
```
```
    pep.SerializeToString(&buff);
```
```
 
```
```
    test::People pep2;
```
```
    pep2.ParseFromString(buff);
```
```
 
```

    std::cout << pep2.name() << std::endl;

    std::cout << pep2.age() << std::endl;

    std::cout << pep2.steps() << std::endl;

```
 
```
```
    int data_len = pep.ByteSize();
```
```
    unsigned char data[1024] = "\0";
```

    pep.SerializeToArray(data, data_len);

```
    for(auto i = 0; i < data_len; i ++)
```
```
        printf("%02X ", data[i]);
```
```
    printf("\n");
```
```
 
```
```
    test::People pep3;
```

    pep3.ParseFromArray(data, data_len);

```
 
```

    std::cout << pep3.name() << std::endl;

    std::cout << pep3.age() << std::endl;

    std::cout << pep3.steps() << std::endl;

```
 
```
```
    return 0;
```
```
}
```